ceph/doc/releases.rst

   1 =============
   2 Ceph Releases
   3 =============
   4
   5 Timeline
   6 --------
   7
   8 +----------------------------+-----------+-----------+-----------+-----------+-----------+--------------+-----------+-----------+
   9 |                            |`Dumpling`_|`Emperor`_ |`Firefly`_ |`Giant`_   |`Hammer`_  |`Infernalis`_ |`Jewel`_   |`Kraken`_  |
  10 |                            |LTS        |Stable     |LTS        |Stable     |LTS        |Stable        |LTS        |Stable     |
  11 +----------------------------+-----------+-----------+-----------+-----------+-----------+--------------+-----------+-----------+
  12 |     First release          | August    | November  | May       | October   | April     | November     | April     | January   |
  13 |                            | 2013      | 2013      | 2014      | 2014      | 2015      | 2015         | 2016      | 2017      |
  14 +----------------------------+-----------+-----------+-----------+-----------+-----------+--------------+-----------+-----------+
  15 |  Estimated retirement      | March     |           | January   |           | May       |              | November  |           |
  16 |                            | 2015      |           | 2016      |           | 2017      |              | 2017      |           |
  17 +----------------------------+-----------+-----------+-----------+-----------+-----------+--------------+-----------+-----------+
  18 |    Actual retirement       | May       | May       | April     | April     |           | April 2016   |           |           |
  19 |                            | 2015      | 2014      | 2016      | 2015      |           |              |           |           |
  20 +----------------------------+-----------+-----------+-----------+-----------+-----------+--------------+-----------+-----------+
  21
  22 +----------------+-----------+-----------+-----------+-----------+-----------+-----------+--------------+-----------+-----------+
  23 |                |Development|`Dumpling`_|`Emperor`_ |`Firefly`_ |`Giant`_   |`Hammer`_  |`Infernalis`_ |`Jewel`_   |`Kraken`_  |
  24 |                |Testing    |LTS        |Stable     |LTS        |Stable     |LTS        |Stable        |LTS        |Stable     |
  25 +----------------+-----------+-----------+-----------+-----------+-----------+-----------+--------------+-----------+-----------+
  26 | June      2017 |`12.1.0`_  |           |           |           |           |           |              |           |           |
  27 +----------------+-----------+-----------+-----------+-----------+-----------+-----------+--------------+-----------+-----------+
  28 | May       2017 |`12.0.3`_  |           |           |           |           |           |              |           |           |
  29 +----------------+-----------+-----------+-----------+-----------+-----------+-----------+--------------+-----------+-----------+
  30 | April     2017 |`12.0.2`_  |           |           |           |           |           |              |`10.2.7`_  |           |
  31 +----------------+-----------+-----------+-----------+-----------+-----------+-----------+--------------+-----------+-----------+
  32 | March     2017 |`12.0.1`_  |           |           |           |           |           |              |`10.2.6`_  |           |
  33 +----------------+-----------+-----------+-----------+-----------+-----------+-----------+--------------+-----------+-----------+
  34 | February  2017 |`12.0.0`_  |           |           |           |           |`0.94.10`_ |              |           |           |
  35 +----------------+-----------+-----------+-----------+-----------+-----------+-----------+--------------+-----------+-----------+
  36 | January   2017 | 11.1.1    |           |           |           |           |           |              |           |`11.2.0`_  |
  37 +----------------+-----------+-----------+-----------+-----------+-----------+-----------+--------------+-----------+-----------+
  38 | December  2016 | 11.1.0    |           |           |           |           |           |              |`10.2.5`_  |           |
  39 +                +-----------+-----------+-----------+-----------+-----------+-----------+--------------+-----------+-----------+
  40 |                |           |           |           |           |           |           |              |`10.2.4`_  |           |
  41 +----------------+-----------+-----------+-----------+-----------+-----------+-----------+--------------+-----------+-----------+
  42 | October   2016 |`11.0.2`_  |           |           |           |           |           |              |           |           |
  43 +                +-----------+-----------+-----------+-----------+-----------+-----------+--------------+-----------+-----------+
  44 |                | 11.0.1    |           |           |           |           |           |              |           |           |
  45 +----------------+-----------+-----------+-----------+-----------+-----------+-----------+--------------+-----------+-----------+
  46 | September 2016 |           |           |           |           |           |           |              |`10.2.3`_  |           |
  47 +----------------+-----------+-----------+-----------+-----------+-----------+-----------+--------------+-----------+-----------+
  48 | August    2016 |           |           |           |           |           |`0.94.9`_  |              |           |           |
  49 +                +-----------+-----------+-----------+-----------+-----------+-----------+--------------+-----------+-----------+
  50 |                |           |           |           |           |           |`0.94.8`_  |              |           |           |
  51 +----------------+-----------+-----------+-----------+-----------+-----------+-----------+--------------+-----------+-----------+
  52 | June      2016 | 11.0.0    |           |           |           |           |           |              |`10.2.2`_  |           |
  53 +----------------+-----------+-----------+-----------+-----------+-----------+-----------+--------------+-----------+-----------+
  54 | May       2016 |           |           |           |           |           |`0.94.7`_  |              |`10.2.1`_  |           |
  55 +----------------+-----------+-----------+-----------+-----------+-----------+-----------+--------------+-----------+-----------+
  56 | April     2016 |`10.1.2`_  |           |           |           |           |           |              |`10.2.0`_  |           |
  57 |                +-----------+-----------+-----------+-----------+-----------+-----------+--------------+-----------+-----------+
  58 |                |`10.1.1`_  |           |           |           |           |           |              |           |           |
  59 +----------------+-----------+-----------+-----------+-----------+-----------+-----------+--------------+-----------+-----------+
  60 | March     2016 |`10.1.0`_  |           |           |           |           |           |              |           |           |
  61 |                +-----------+-----------+-----------+-----------+-----------+-----------+--------------+-----------+-----------+
  62 |                |`10.0.5`_  |           |           |           |           |           |              |           |           |
  63 +----------------+-----------+-----------+-----------+-----------+-----------+-----------+--------------+-----------+-----------+
  64 | February  2016 |`10.0.3`_  |           |           |           |           |`0.94.6`_  |`9.2.1`_      |           |           |
  65 +----------------+-----------+-----------+-----------+-----------+-----------+-----------+--------------+-----------+-----------+
  66 | January   2016 |`10.0.2`_  |           |           |           |           |           |              |           |           |
  67 +----------------+-----------+-----------+-----------+-----------+-----------+-----------+--------------+-----------+-----------+
  68 | December  2015 |`10.0.1`_  |           |           |           |           |           |              |           |           |
  69 +----------------+-----------+-----------+-----------+-----------+-----------+-----------+--------------+-----------+-----------+
  70 | November  2015 |`10.0.0`_  |           |           |`0.80.11`_ |           |           |`9.2.0`_      |           |           |
  71 +----------------+-----------+-----------+-----------+-----------+-----------+-----------+--------------+-----------+-----------+
  72 | October   2015 |`9.1.0`_   |           |           |           |           |`0.94.5`_  |              |           |           |
  73 |                +-----------+-----------+-----------+-----------+-----------+-----------+--------------+-----------+-----------+
  74 |                |           |           |           |           |           |`0.94.4`_  |              |           |           |
  75 +----------------+-----------+-----------+-----------+-----------+-----------+-----------+--------------+-----------+-----------+
  76 | August    2015 |`9.0.3`_   |           |           |           |           |`0.94.3`_  |              |           |           |
  77 +----------------+-----------+-----------+-----------+-----------+-----------+-----------+--------------+-----------+-----------+
  78 | July      2015 |`9.0.2`_   |           |           |`0.80.10`_ |           |           |              |           |           |
  79 +----------------+-----------+-----------+-----------+-----------+-----------+-----------+--------------+-----------+-----------+
  80 | June      2015 |`9.0.1`_   |           |           |           |           |`0.94.2`_  |              |           |           |
  81 +----------------+-----------+-----------+-----------+-----------+-----------+-----------+--------------+-----------+-----------+
  82 | May       2015 |`9.0.0`_   |           |           |           |           |           |              |           |           |
  83 +----------------+-----------+-----------+-----------+-----------+-----------+-----------+--------------+-----------+-----------+
  84 | April     2015 |           |           |           |           |`0.87.2`_  |`0.94.1`_  |              |           |           |
  85 |                +-----------+-----------+-----------+-----------+-----------+-----------+--------------+-----------+-----------+
  86 |                |           |           |           |           |           |`0.94`_    |              |           |           |
  87 +----------------+-----------+-----------+-----------+-----------+-----------+-----------+--------------+-----------+-----------+
  88 | March     2015 |           |           |           |`0.80.9`_  |           |           |              |           |           |
  89 +----------------+-----------+-----------+-----------+-----------+-----------+-----------+--------------+-----------+-----------+
  90 | February  2015 |`0.93`_    |           |           |           |`0.87.1`_  |           |              |           |           |
  91 |                +-----------+-----------+-----------+-----------+-----------+-----------+--------------+-----------+-----------+
  92 |                |`0.92`_    |           |           |           |           |           |              |           |           |
  93 +----------------+-----------+-----------+-----------+-----------+-----------+-----------+--------------+-----------+-----------+
  94 | January   2015 |`0.91`_    |           |           |`0.80.8`_  |           |           |              |           |           |
  95 +----------------+-----------+-----------+-----------+-----------+-----------+-----------+--------------+-----------+-----------+
  96 | December  2014 |`0.90`_    |           |           |           |           |           |              |           |           |
  97 |                +-----------+-----------+-----------+-----------+-----------+-----------+--------------+-----------+-----------+
  98 |                |`0.89`_    |           |           |           |           |           |              |           |           |
  99 +----------------+-----------+-----------+-----------+-----------+-----------+-----------+--------------+-----------+-----------+
 100 | November  2014 |`0.88`_    |           |           |           |           |           |              |           |           |
 101 +----------------+-----------+-----------+-----------+-----------+-----------+-----------+--------------+-----------+-----------+
 102 | October   2014 |`0.86`_    |           |           |`0.80.7`_  |`0.87`_    |           |              |           |           |
 103 |                +-----------+-----------+-----------+-----------+-----------+-----------+--------------+-----------+-----------+
 104 |                |           |           |           |`0.80.6`_  |           |           |              |           |           |
 105 +----------------+-----------+-----------+-----------+-----------+-----------+-----------+--------------+-----------+-----------+
 106 | September 2014 |`0.85`_    |`0.67.11`_ |           |           |           |           |              |           |           |
 107 +----------------+-----------+-----------+-----------+-----------+-----------+-----------+--------------+-----------+-----------+
 108 | August    2014 |`0.84`_    |`0.67.10`_ |           |           |           |           |              |           |           |
 109 +----------------+-----------+-----------+-----------+-----------+-----------+-----------+--------------+-----------+-----------+
 110 | July      2014 |`0.83`_    |           |           |`0.80.5`_  |           |           |              |           |           |
 111 |                +-----------+-----------+-----------+-----------+-----------+-----------+--------------+-----------+-----------+
 112 |                |           |           |           |`0.80.4`_  |           |           |              |           |           |
 113 |                +-----------+-----------+-----------+-----------+-----------+-----------+--------------+-----------+-----------+
 114 |                |           |           |           |`0.80.3`_  |           |           |              |           |           |
 115 |                +-----------+-----------+-----------+-----------+-----------+-----------+--------------+-----------+-----------+
 116 |                |           |           |           |`0.80.2`_  |           |           |              |           |           |
 117 +----------------+-----------+-----------+-----------+-----------+-----------+-----------+--------------+-----------+-----------+
 118 | June      2014 |`0.82`_    |           |           |           |           |           |              |           |           |
 119 |                +-----------+-----------+-----------+-----------+-----------+-----------+--------------+-----------+-----------+
 120 |                |`0.81`_    |           |           |           |           |           |              |           |           |
 121 +----------------+-----------+-----------+-----------+-----------+-----------+-----------+--------------+-----------+-----------+
 122 | May       2014 |           |`0.67.9`_  |           |`0.80.1`_  |           |           |              |           |           |
 123 |                +-----------+-----------+-----------+-----------+-----------+-----------+--------------+-----------+-----------+
 124 |                |           |`0.67.8`_  |           |`0.80`_    |           |           |              |           |           |
 125 +----------------+-----------+-----------+-----------+-----------+-----------+-----------+--------------+-----------+-----------+
 126 | April     2014 |`0.79`_    |           |           |           |           |           |              |           |           |
 127 +----------------+-----------+-----------+-----------+-----------+-----------+-----------+--------------+-----------+-----------+
 128 | March     2014 |`0.78`_    |           |           |           |           |           |              |           |           |
 129 +----------------+-----------+-----------+-----------+-----------+-----------+-----------+--------------+-----------+-----------+
 130 | February  2014 |`0.77`_    |`0.67.7`_  |           |           |           |           |              |           |           |
 131 |                +-----------+-----------+-----------+-----------+-----------+-----------+--------------+-----------+-----------+
 132 |                |           |`0.67.6`_  |           |           |           |           |              |           |           |
 133 +----------------+-----------+-----------+-----------+-----------+-----------+-----------+--------------+-----------+-----------+
 134 | January   2014 |`0.76`_    |           |           |           |           |           |              |           |           |
 135 |                +-----------+-----------+-----------+-----------+-----------+-----------+--------------+-----------+-----------+
 136 |                |`0.75`_    |           |           |           |           |           |              |           |           |
 137 +----------------+-----------+-----------+-----------+-----------+-----------+-----------+--------------+-----------+-----------+
 138 | December  2013 |`0.74`_    |`0.67.5`_  |`0.72.2`_  |           |           |           |              |           |           |
 139 |                +-----------+-----------+-----------+-----------+-----------+-----------+--------------+-----------+-----------+
 140 |                |`0.73`_    |           |           |           |           |           |              |           |           |
 141 +----------------+-----------+-----------+-----------+-----------+-----------+-----------+--------------+-----------+-----------+
 142 | November  2013 |           |           |`0.72.1`_  |           |           |           |              |           |           |
 143 |                +-----------+-----------+-----------+-----------+-----------+-----------+--------------+-----------+-----------+
 144 |                |           |           |`0.72`_    |           |           |           |              |           |           |
 145 +----------------+-----------+-----------+-----------+-----------+-----------+-----------+--------------+-----------+-----------+
 146 | October   2013 |`0.71`_    |`0.67.4`_  |           |           |           |           |              |           |           |
 147 |                +-----------+-----------+-----------+-----------+-----------+-----------+--------------+-----------+-----------+
 148 |                |`0.70`_    |           |           |           |           |           |              |           |           |
 149 +----------------+-----------+-----------+-----------+-----------+-----------+-----------+--------------+-----------+-----------+
 150 | September 2013 |`0.69`_    |           |           |           |           |           |              |           |           |
 151 |                +-----------+-----------+-----------+-----------+-----------+-----------+--------------+-----------+-----------+
 152 |                |`0.68`_    |`0.67.3`_  |           |           |           |           |              |           |           |
 153 +----------------+-----------+-----------+-----------+-----------+-----------+-----------+--------------+-----------+-----------+
 154 | August    2013 |           |`0.67.2`_  |           |           |           |           |              |           |           |
 155 |                +-----------+-----------+-----------+-----------+-----------+-----------+--------------+-----------+-----------+
 156 |                |           |`0.67.1`_  |           |           |           |           |              |           |           |
 157 |                +-----------+-----------+-----------+-----------+-----------+-----------+--------------+-----------+-----------+
 158 |                |           |`0.67`_    |           |           |           |           |              |           |           |
 159 +----------------+-----------+-----------+-----------+-----------+-----------+-----------+--------------+-----------+-----------+
 160
 161
 162 .. _12.1.0: ../release-notes#v12-1-0-luminous-rc
 163 .. _12.0.3: ../release-notes#v12-0-3-luminous-dev
 164 .. _12.0.2: ../release-notes#v12-0-2-luminous-dev
 165 .. _12.0.1: ../release-notes#v12-0-1-luminous-dev
 166 .. _12.0.0: ../release-notes#v12-0-0-luminous-dev
 167
 168 .. _11.2.0: ../release-notes#v11-2-0-kraken
 169 .. _Kraken: ../release-notes#v11-2-0-kraken
 170
 171 .. _11.0.2: ../release-notes#v11-0-2-kraken
 172
 173 .. _10.2.7: ../release-notes#v10-2-7-jewel
 174 .. _10.2.6: ../release-notes#v10-2-6-jewel
 175 .. _10.2.5: ../release-notes#v10-2-5-jewel
 176 .. _10.2.4: ../release-notes#v10-2-4-jewel
 177 .. _10.2.3: ../release-notes#v10-2-3-jewel
 178 .. _10.2.2: ../release-notes#v10-2-2-jewel
 179 .. _10.2.1: ../release-notes#v10-2-1-jewel
 180 .. _10.2.0: ../release-notes#v10-2-0-jewel
 181 .. _Jewel: ../release-notes#v10-2-0-jewel
 182
 183 .. _10.1.2: ../release-notes#v10-1-2-jewel-release-candidate
 184 .. _10.1.1: ../release-notes#v10-1-1-jewel-release-candidate
 185 .. _10.1.0: ../release-notes#v10-1-0-jewel-release-candidate
 186 .. _10.0.5: ../release-notes#v10-0-5
 187 .. _10.0.3: ../release-notes#v10-0-3
 188 .. _10.0.2: ../release-notes#v10-0-2
 189 .. _10.0.1: ../release-notes#v10-0-1
 190 .. _10.0.0: ../release-notes#v10-0-0
 191
 192 .. _9.2.1: ../release-notes#v9-2-1-infernalis
 193 .. _9.2.0: ../release-notes#v9-2-0-infernalis
 194 .. _Infernalis: ../release-notes#v9-2-0-infernalis
 195
 196 .. _9.1.0: ../release-notes#v9-1-0
 197 .. _9.0.3: ../release-notes#v9-0-3
 198 .. _9.0.2: ../release-notes#v9-0-2
 199 .. _9.0.1: ../release-notes#v9-0-1
 200 .. _9.0.0: ../release-notes#v9-0-0
 201
 202 .. _0.94.10: ../release-notes#v0-94-10-hammer
 203 .. _0.94.9: ../release-notes#v0-94-9-hammer
 204 .. _0.94.8: ../release-notes#v0-94-8-hammer
 205 .. _0.94.7: ../release-notes#v0-94-7-hammer
 206 .. _0.94.6: ../release-notes#v0-94-6-hammer
 207 .. _0.94.5: ../release-notes#v0-94-5-hammer
 208 .. _0.94.4: ../release-notes#v0-94-4-hammer
 209 .. _0.94.3: ../release-notes#v0-94-3-hammer
 210 .. _0.94.2: ../release-notes#v0-94-2-hammer
 211 .. _0.94.1: ../release-notes#v0-94-1-hammer
 212 .. _0.94: ../release-notes#v0-94-hammer
 213 .. _Hammer: ../release-notes#v0-94-hammer
 214
 215 .. _0.93: ../release-notes#v0-93
 216 .. _0.92: ../release-notes#v0-92
 217 .. _0.91: ../release-notes#v0-91
 218 .. _0.90: ../release-notes#v0-90
 219 .. _0.89: ../release-notes#v0-89
 220 .. _0.88: ../release-notes#v0-88
 221
 222 .. _0.87.2: ../release-notes#v0-87-2-giant
 223 .. _0.87.1: ../release-notes#v0-87-1-giant
 224 .. _0.87: ../release-notes#v0-87-giant
 225 .. _Giant: ../release-notes#v0-87-giant
 226
 227 .. _0.86: ../release-notes#v0-86
 228 .. _0.85: ../release-notes#v0-85
 229 .. _0.84: ../release-notes#v0-84
 230 .. _0.83: ../release-notes#v0-83
 231 .. _0.82: ../release-notes#v0-82
 232 .. _0.81: ../release-notes#v0-81
 233
 234 .. _0.80.11: ../release-notes#v0-80-11-firefly
 235 .. _0.80.10: ../release-notes#v0-80-10-firefly
 236 .. _0.80.9: ../release-notes#v0-80-9-firefly
 237 .. _0.80.8: ../release-notes#v0-80-8-firefly
 238 .. _0.80.7: ../release-notes#v0-80-7-firefly
 239 .. _0.80.6: ../release-notes#v0-80-6-firefly
 240 .. _0.80.5: ../release-notes#v0-80-5-firefly
 241 .. _0.80.4: ../release-notes#v0-80-4-firefly
 242 .. _0.80.3: ../release-notes#v0-80-3-firefly
 243 .. _0.80.2: ../release-notes#v0-80-2-firefly
 244 .. _0.80.1: ../release-notes#v0-80-1-firefly
 245 .. _0.80: ../release-notes#v0-80-firefly
 246 .. _Firefly: ../release-notes#v0-80-firefly
 247
 248 .. _0.79: ../release-notes#v0-79
 249 .. _0.78: ../release-notes#v0-78
 250 .. _0.77: ../release-notes#v0-77
 251 .. _0.76: ../release-notes#v0-76
 252 .. _0.75: ../release-notes#v0-75
 253 .. _0.74: ../release-notes#v0-74
 254 .. _0.73: ../release-notes#v0-73
 255
 256 .. _0.72.2: ../release-notes#v0-72-2-emperor
 257 .. _0.72.1: ../release-notes#v0-72-1-emperor
 258 .. _0.72: ../release-notes#v0-72-emperor
 259 .. _Emperor: ../release-notes#v0-72-emperor
 260
 261 .. _0.71: ../release-notes#v0-71
 262 .. _0.70: ../release-notes#v0-70
 263 .. _0.69: ../release-notes#v0-69
 264 .. _0.68: ../release-notes#v0-68
 265
 266 .. _0.67.11: ../release-notes#v0-67-11-dumpling
 267 .. _0.67.10: ../release-notes#v0-67-10-dumpling
 268 .. _0.67.9: ../release-notes#v0-67-9-dumpling
 269 .. _0.67.8: ../release-notes#v0-67-8-dumpling
 270 .. _0.67.7: ../release-notes#v0-67-7-dumpling
 271 .. _0.67.6: ../release-notes#v0-67-6-dumpling
 272 .. _0.67.5: ../release-notes#v0-67-5-dumpling
 273 .. _0.67.4: ../release-notes#v0-67-4-dumpling
 274 .. _0.67.3: ../release-notes#v0-67-3-dumpling
 275 .. _0.67.2: ../release-notes#v0-67-2-dumpling
 276 .. _0.67.1: ../release-notes#v0-67-1-dumpling
 277 .. _0.67: ../release-notes#v0-67-dumpling
 278 .. _Dumpling:  ../release-notes#v0-67-dumpling
 279
 280 Understanding the release cycle
 281 -------------------------------
 282
 283 The development release cycle is two to four weeks long.  Each cycle
 284 freezes the master development branch and applies `integration and
 285 upgrade tests <https://github.com/ceph/ceph-qa-suite>`_ for the
 286 duration of one cycle before it is released and the next release's
 287 code is frozen for testing.  Once released, there is no effort to
 288 backport fixes; developer focus in on the next development release
 289 which is usually only a few weeks away.
 290
 291 There are three to four stable releases a year.  Each stable release
 292 will receive a name (e.g., 'Jewel') and bug fix backports at least
 293 until the next stable release is out.
 294
 295 Every other stable releases is a LTS (Long Term Stable) and will
 296 receive updates until two LTS are published. For instance Dumpling is
 297 retired when Hammer is published, Firefly is retired when Jewel is
 298 published etc. The rationale is that backports to a LTS (Firefly for
 299 instance) are expected to happen until the next LTS is published
 300 (Jewel is the LTS following Hammer), to fix bugs and possibly
 301 backport important features. After the next LTS is published,
 302 backports are still expected to fix bugs with a focus on whatever can
 303 prevent upgrades to the next LTS (in our example, fixes to Dumpling
 304 were published after Firefly was released and until Hammer was
 305 published, primarily to ensure Dumpling cluster can smoothly migrate
 306 to Firefly).
 307
 308 * Long Term Stable : until the next two LTS are published
 309 * Stable release : until the next stable release is published
 310 * Development / testing release : no backports
 311
 312 For each stable release:
 313
 314 * `Integration and upgrade tests
 315   <https://github.com/ceph/ceph-qa-suite>`_ are run on a regular basis
 316   and `their results <http://pulpito.ceph.com/>`_ analyzed by Ceph
 317   developers.
 318 * `Issues <http://tracker.ceph.com/projects/ceph/issues?query_id=27>`_
 319   fixed in the development branch (master) are scheduled to be backported.
 320 * When an issue found in the stable release is `reported
 321   <http://tracker.ceph.com/projects/ceph/issues/new>`_, it is
 322   triaged by Ceph developers.
 323 * The `stable releases and backport team <http://tracker.ceph.com/projects/ceph-releases>`_
 324   publishes ``point releases`` including fixes that have been backported to the stable release.
 325
 326 In the timeline, the life time of a LTS is calculated to be
 327 approximately 18 months after the month of the first release. For
 328 instance, Dumpling is published August 2013 and 18 months starting
 329 September 2013 is February 2015, therefore by March 2015 Dumpling
 330 should be retired. The lifetime of a release may vary because it
 331 depend on how quickly the stable releases are published. For instance
 332 although Dumpling theoritical retirement was March 2015, it was
 333 extended to May 2015.
 334
 335 Release numbers conventions
 336 ---------------------------
 337
 338 The first Ceph release back in Jan of 2008 was 0.1.  That made sense at
 339 the time.  The versioning scheme did not change until April 2015,
 340 when 0.94.1 (the first Hammer point release) was published.  To avoid reaching
 341 0.99 (and 0.100 or 1.00?) we have a new strategy.
 342
 343 * x.0.z - development releases (for early testers and the brave at heart)
 344 * x.1.z - release candidates (for test clusters, brave users)
 345 * x.2.z - stable/bugfix releases (for users)
 346
 347 ``x`` will start at 9 for Infernalis (``I`` is the 9th letter), making
 348 our first development release of the 9th release cycle 9.0.0.
 349 Subsequent development releases will be 9.0.1, 9.0.2, etc.
 350
 351 After a couple months we'll have a 9.1.0 (and maybe 9.1.1) release candidate.
 352
 353 A few weeks after that we'll have the Infernalis release 9.2.0, followed
 354 by stable bug fix updates 9.2.1, 9.2.2, etc., and then begin work on the
 355 Jewel (10.y.z) release.