[tahoe-lafs-trac-stream] [tahoe-lafs] #1816: add a lease renewal method that only renews some shares in a shareset, to be used by repair/rebalancing

[tahoe-lafs]

#1816: add a lease renewal method that only renews some shares in a shareset, to
be used by repair/rebalancing
-------------------------+-------------------------------------------------
     Reporter:           |      Owner:
  davidsarah             |     Status:  new
         Type:  defect   |  Milestone:  undecided
     Priority:  normal   |    Version:  1.9.2
    Component:  code-    |   Keywords:  forward-compatibility rebalancing
  storage                |  repair RIStorageServer
   Resolution:           |
Launchpad Bug:           |
-------------------------+-------------------------------------------------

Comment (by davidsarah):

 Straw-man signature:
 {{{
 def add_or_renew_leases(storage_index=StorageIndex,
                         sharenums=SetOf(int, maxLength=MAX_BUCKETS),
                         requested_duration_seconds=int)
     """
     Renew leases on the specified shares, or add them where there is no
 existing
     lease, requesting the given lease duration in seconds. Raise
 IndexError (and
     do not renew any leases) if any of the specified shares are not held
 by this
     server.

     Returns the lease duration accepted by the server, in seconds, which
 may be
     smaller than the requested duration. (This value does not take into
 account
     that existing leases on one of more of the specified shares, added by
 this or
     other accounts, may have a longer duration.)

     Server expiration policy might result in shares being deleted before
 the
     accepted lease duration returned by this method, but this should not
 normally
     happen without intervention to change the configured policy (for this
 account
     or globally), or to explicitly delete shares.
     """
     return int
 }}}

-- 
Ticket URL: <https://tahoe-lafs.org/trac/tahoe-lafs/ticket/1816#comment:2>
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