1. 07 May, 2014 4 commits
  2. 05 May, 2014 2 commits
    • antirez's avatar
      Redis 2.9.52 (Redis 3.0.0 beta-3). · b7a6a6c4
      antirez authored
      b7a6a6c4
    • antirez's avatar
      CLUSTER SET-CONFIG-EPOCH implemented. · c4c7389f
      antirez authored
      Initially Redis Cluster accepted that after cluster creation all the
      nodes were at configEpoch 0, evolving from zero as failovers happen.
      
      However later the semantic was made more strict in order to make sure a
      cluster has always all the master nodes with a different configEpoch,
      which is more robust in some corner case (especially resulting from
      errors by the system administrator).
      
      To assign different configEpochs to different nodes at startup was a
      task performed naturally by the config conflicts resolution algorithm
      (see the Cluster specification). However this works well only for small
      clusters or when there are actually just a few collisions, since it is
      designed for exceptional cases.
      
      When a large cluster is created hundred of nodes can be at epoch 0, so
      the conflict resolution code is slow to provide an unique config to each
      node. For this reason this new command was introduced. It can be called
      only when a node is totally fresh: no other nodes known, and configEpoch
      set to zero, so it is safe even against misuses.
      
      redis-trib will use the new command in order to start the cluster
      already setting an incremental unique config to every node.
      c4c7389f
  3. 28 Apr, 2014 10 commits
    • antirez's avatar
      CLIENT LIST speedup via peerid caching + smart allocation. · a11ae385
      antirez authored
      This commit adds peer ID caching in the client structure plus an API
      change and the use of sdsMakeRoomFor() in order to improve the
      reallocation pattern to generate the CLIENT LIST output.
      
      Both the changes account for a very significant speedup.
      a11ae385
    • antirez's avatar
      bb00154f
    • antirez's avatar
      Added new sdscatfmt() %u and %U format specifiers. · e285a570
      antirez authored
      This commit also fixes a bug in the implementation of sdscatfmt()
      resulting from stale references to the SDS string header after
      sdsMakeRoomFor() calls.
      e285a570
    • antirez's avatar
      sdscatfmt() added to SDS library. · 0ab06bb5
      antirez authored
      sdscatprintf() relies on printf() family libc functions and is sometimes
      too slow in critical code paths. sdscatfmt() is an alternative which is:
      
      1) Far less capable.
      2) Format specifier uncompatible.
      3) Faster.
      
      It is suitable to be used in those speed critical code paths such as
      CLIENT LIST output generation.
      0ab06bb5
    • antirez's avatar
      Process events with processEventsWhileBlocked() when blocked. · cdd2bd56
      antirez authored
      When we are blocked and a few events a processed from time to time, it
      is smarter to call the event handler a few times in order to handle the
      accept, read, write, close cycle of a client in a single pass, otherwise
      there is too much latency added for clients to receive a reply while the
      server is busy in some way (for example during the DB loading).
      cdd2bd56
    • antirez's avatar
      Accept multiple clients per iteration. · 357b039f
      antirez authored
      When the listening sockets readable event is fired, we have the chance
      to accept multiple clients instead of accepting a single one. This makes
      Redis more responsive when there is a mass-connect event (for example
      after the server startup), and in workloads where a connect-disconnect
      pattern is used often, so that multiple clients are waiting to be
      accepted continuously.
      
      As a side effect, this commit makes the LOADING, BUSY, and similar
      errors much faster to deliver to the client, making Redis more
      responsive when there is to return errors to inform the clients that the
      server is blocked in an not interruptible operation.
      357b039f
    • antirez's avatar
      AE_ERR -> ANET_ERR in acceptUnixHandler(). · ba861194
      antirez authored
      No actual changes since the value is the same.
      ba861194
    • antirez's avatar
      3acae3de
    • antirez's avatar
      clusterLoadConfig() REDIS_ERR retval semantics refined. · b008863e
      antirez authored
      We should return REDIS_ERR to signal we can't read the configuration
      because there is no config file only after checking errno, othewise
      we risk to rewrite an existing file that was not accessible for some
      other reason.
      b008863e
    • antirez's avatar
      Lock nodes.conf to avoid multiple processes using the same file. · 71d71814
      antirez authored
      This was a common source of problems among users.
      The solution adopted is not bullet-proof as if the user deletes the
      nodes.conf file manually, and starts a new instance with the same
      nodes.conf file path, two instances will use the same file. However
      following this reasoning the user may drop a nuclear bomb into the
      datacenter as well.
      71d71814
  4. 23 Apr, 2014 4 commits
  5. 22 Apr, 2014 1 commit
  6. 18 Apr, 2014 8 commits
  7. 16 Apr, 2014 11 commits