1. 13 Jan, 2014 1 commit
  2. 09 Jan, 2014 2 commits
  3. 08 Jan, 2014 4 commits
  4. 25 Dec, 2013 5 commits
  5. 23 Dec, 2013 2 commits
    • antirez's avatar
      Fix CONFIG REWRITE handling of unknown options. · 4ad219ad
      antirez authored
      There were two problems with the implementation.
      
      1) "save" was not correctly processed when no save point was configured,
         as reported in issue #1416.
      2) The way the code checked if an option existed in the "processed"
         dictionary was wrong, as we add the element with as a key associated
         with a NULL value, so dictFetchValue() can't be used to check for
         existance, but dictFind() must be used, that returns NULL only if the
         entry does not exist at all.
      4ad219ad
    • antirez's avatar
      Configuring port to 0 disables IP socket as specified. · c6db326d
      antirez authored
      This was no longer the case with 2.8 becuase of a bug introduced with
      the IPv6 support. Now it is fixed.
      
      This fixes issue #1287 and #1477.
      c6db326d
  6. 22 Dec, 2013 2 commits
    • antirez's avatar
      Make new masters inherit replication offsets. · 4456ee11
      antirez authored
      Currently replication offsets could be used into a limited way in order
      to understand, out of a set of slaves, what is the one with the most
      updated data. For example this comparison is possible of N slaves
      were replicating all with the same master.
      
      However the replication offset was not transferred from master to slaves
      (that are later promoted as masters) in any way, so for instance if
      there were three instances A, B, C, with A master and B and C
      replication from A, the following could happen:
      
      C disconnects from A.
      B is turned into master.
      A is switched to master of B.
      B receives some write.
      
      In this context there was no way to compare the offset of A and C,
      because B would use its own local master replication offset as
      replication offset to initialize the replication with A.
      
      With this commit what happens is that when B is turned into master it
      inherits the replication offset from A, making A and C comparable.
      In the above case assuming no inconsistencies are created during the
      disconnection and failover process, A will show to have a replication
      offset greater than C.
      
      Note that this does not mean offsets are always comparable to understand
      what is, in a set of instances, since in more complex examples the
      replica with the higher replication offset could be partitioned away
      when picking the instance to elect as new master. However this in
      general improves the ability of a system to try to pick a good replica
      to promote to master.
      4456ee11
    • antirez's avatar
      Slave disconnection is an event worth logging. · 5fa937d9
      antirez authored
      5fa937d9
  7. 20 Dec, 2013 1 commit
  8. 19 Dec, 2013 6 commits
  9. 13 Dec, 2013 4 commits
  10. 12 Dec, 2013 3 commits
  11. 11 Dec, 2013 4 commits
  12. 10 Dec, 2013 6 commits
    • antirez's avatar
      Slaves heartbeats during sync improved. · 563d6b3f
      antirez authored
      The previous fix for false positive timeout detected by master was not
      complete. There is another blocking stage while loading data for the
      first synchronization with the master, that is, flushing away the
      current data from the DB memory.
      
      This commit uses the newly introduced dict.c callback in order to make
      some incremental work (to send "\n" heartbeats to the master) while
      flushing the old data from memory.
      
      It is hard to write a regression test for this issue unfortunately. More
      support for debugging in the Redis core would be needed in terms of
      functionalities to simulate a slow DB loading / deletion.
      563d6b3f
    • antirez's avatar
      dict.c: added optional callback to dictEmpty(). · b6610a56
      antirez authored
      Redis hash table implementation has many non-blocking features like
      incremental rehashing, however while deleting a large hash table there
      was no way to have a callback called to do some incremental work.
      
      This commit adds this support, as an optiona callback argument to
      dictEmpty() that is currently called at a fixed interval (one time every
      65k deletions).
      b6610a56
    • antirez's avatar
      26cf5c8a
    • antirez's avatar
      303cc97f
    • antirez's avatar
      Slaves heartbeat while loading RDB files. · 75bf5a4a
      antirez authored
      Starting with Redis 2.8 masters are able to detect timed out slaves,
      while before 2.8 only slaves were able to detect a timed out master.
      
      Now that timeout detection is bi-directional the following problem
      happens as described "in the field" by issue #1449:
      
      1) Master and slave setup with big dataset.
      2) Slave performs the first synchronization, or a full sync
         after a failed partial resync.
      3) Master sends the RDB payload to the slave.
      4) Slave loads this payload.
      5) Master detects the slave as timed out since does not receive back the
         REPLCONF ACK acknowledges.
      
      Here the problem is that the master has no way to know how much the
      slave will take to load the RDB file in memory. The obvious solution is
      to use a greater replication timeout setting, but this is a shame since
      for the 0.1% of operation time we are forced to use a timeout that is
      not what is suited for 99.9% of operation time.
      
      This commit tries to fix this problem with a solution that is a bit of
      an hack, but that modifies little of the replication internals, in order
      to be back ported to 2.8 safely.
      
      During the RDB loading time, we send the master newlines to avoid
      being sensed as timed out. This is the same that the master already does
      while saving the RDB file to still signal its presence to the slave.
      
      The single newline is used because:
      
      1) It can't desync the protocol, as it is only transmitted all or
      nothing.
      2) It can be safely sent while we don't have a client structure for the
      master or in similar situations just with write(2).
      75bf5a4a
    • antirez's avatar
      Handle inline requested terminated with just \n. · 8d0083ba
      antirez authored
      8d0083ba