glusterfs.git/xlators/performance/write-behind, branch v2.0.10rc2

performance/write-behind: Resume all the consecutive non-write operations in the request queue in a single go.

2010-03-29T11:29:52+00:00

Signed-off-by: Raghavendra G 
Signed-off-by: Anand V. Avati 

BUG: 740 (read-ahead does not work to its full potential when loaded on top of write-behind)
URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=740

performance/write-behind: fix data corruption while aggregating the adjacent contiguous iobufs into a single iobuf

2010-02-23T07:27:06+00:00

- while aggregating, we should make sure that the destination has enough
   memory. __wb_collapse_write_bufs assumed that destination vector's iov_base
   was aligned to the start of an iobuf and hence memory of page_size is
   available for aggregation. This assumption is not always true, like in the
   configuration consisting afr->write->io-cache (afr is on top). Refer to the
   bug url for more details.

Signed-off-by: Raghavendra G 
Signed-off-by: Anand V. Avati 

BUG: 542 (write-behind crashes)
URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=542

performance/write-behind: refactor __wb_collapse_write_bufs

2010-02-23T07:27:02+00:00

- refactor done to remove duplicated code.

Signed-off-by: Raghavendra G 
Signed-off-by: Anand V. Avati 

BUG: 542 (write-behind crashes)
URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=542

write-behind: fix 'option enable-trickling-writes'

2010-01-23T20:36:41+00:00

fix logic in __wb_mark_winds to properly initialize incomplete_writes
and conditionally check based on enable_trickling_writes flag

Signed-off-by: Anand V. Avati 
Signed-off-by: Anand V. Avati 

BUG: 547 (write-behind enable-trickling-writes working?)
URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=547

added few missing options in translator's option array

2009-10-08T04:40:14+00:00

Signed-off-by: Anand V. Avati

Changed occurrences of Z Research to Gluster.

2009-10-07T10:53:02+00:00

Signed-off-by: Anand V. Avati

write-behind: check for NULL file pointer in flush callback

2009-09-24T14:13:41+00:00

Signed-off-by: Anand V. Avati 

BUG: 260 (ls on booster VMP results in error: "File descriptor in bad state")
URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=260

performance/write-behind: Add NULL checks for file pointer.

2009-09-24T12:19:37+00:00

Signed-off-by: Anand V. Avati 

BUG: 260 (ls on booster VMP results in error: "File descriptor in bad state")
URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=260

performance/write-behind: Add a NULL check for request->stub before checking request->stub->fop.

2009-09-24T08:19:16+00:00

- for non-write wind requests, the request structure outlives the stub.
    The call stub is destroyed when stack is wound but request is destroyed
    only when the reply has come.
    (for writes, both stub and request are destroyed when refcount becomes 0,
     which happens only when the write operation is stack unwound and a reply
     for the write operation has come from underlying translators, for non-write
     unwind requests the request is first destroyed before resuming the stub).

Signed-off-by: Anand V. Avati 

BUG: 280 (simple stripe, with write-behind set up, when dbench is run client crashes.)
URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=280

performance/write-behind: store currently aggregated data size in wb_file

2009-09-23T08:47:27+00:00

- this helps us to not traverse the request list whenever we need currently
    aggregated data in the queue

Signed-off-by: Anand V. Avati 

BUG: 276 (write behind needs to be optimized.)
URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=276