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| author | Rainer Gerhards <rgerhards@adiscon.com> | 2009-06-09 19:00:18 +0200 |
|---|---|---|
| committer | Rainer Gerhards <rgerhards@adiscon.com> | 2009-06-09 19:00:18 +0200 |
| commit | 9704f129f72ec9ece11aeccea4bbf0cbccb116cb (patch) | |
| tree | 96f7b742a3040fd73569bf561e466f12b9086449 /doc | |
| parent | 8d1e2e496c6a4a4d40d1e8604c746e0d32013536 (diff) | |
| download | rsyslog-9704f129f72ec9ece11aeccea4bbf0cbccb116cb.tar.gz rsyslog-9704f129f72ec9ece11aeccea4bbf0cbccb116cb.tar.xz rsyslog-9704f129f72ec9ece11aeccea4bbf0cbccb116cb.zip | |
added capability to fsync() queue disk files for enhanced reliability
also adds speed, because you do no longer need to run the whole file
system in sync mode. New testbench and new config directives:
- $MainMsgQueueSyncQueueFiles
- $ActionQueueSyncQueueFiles
Diffstat (limited to 'doc')
| -rw-r--r-- | doc/queues.html | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/doc/queues.html b/doc/queues.html index 4a9509a0..45ce1bd1 100644 --- a/doc/queues.html +++ b/doc/queues.html @@ -115,7 +115,11 @@ isolation. This is currently selected by specifying different <i>$WorkDirectory< config directives before the queue creation statement.</p> <p>To create a disk queue, use the "<i>$<object>QueueType Disk</i>" config directive. Checkpoint intervals can be specified via "<i>$<object>QueueCheckpointInterval</i>", -with 0 meaning no checkpoints. </p> +with 0 meaning no checkpoints. Note that disk-based queues can be made very reliable +by issuing a (f)sync after each write operation. Starting with version 4.3.2, this can +be requested via "<i><object>QueueSyncQueueFiles on/off</i> with the +default being off. Activating this option has a performance penalty, so it should +not be turned on without reason.</p> <h2>In-Memory Queues</h2> <p>In-memory queue mode is what most people have on their mind when they think about computing queues. Here, the enqueued data elements are held in memory. |