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* performance/write-behind: Resume all the consecutive non-write operations in ↵Raghavendra G2010-03-291-3/+0
| | | | | | | | | | the request queue in a single go. Signed-off-by: Raghavendra G <raghavendra@gluster.com> Signed-off-by: Anand V. Avati <avati@dev.gluster.com> 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 ↵Raghavendra G2010-02-221-4/+55
| | | | | | | | | | | | | | | | | contiguous iobufs into a single iobuf - 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 <raghavendra@gluster.com> Signed-off-by: Anand V. Avati <avati@dev.gluster.com> 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_bufsRaghavendra G2010-02-221-36/+38
| | | | | | | | | | - refactor done to remove duplicated code. Signed-off-by: Raghavendra G <raghavendra@gluster.com> Signed-off-by: Anand V. Avati <avati@dev.gluster.com> 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'Anand Avati2010-01-231-8/+4
| | | | | | | | | | | 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 <avati@amp.gluster.com> Signed-off-by: Anand V. Avati <avati@dev.gluster.com> 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 arrayAmar Tumballi2009-10-071-1/+4
| | | | Signed-off-by: Anand V. Avati <avati@dev.gluster.com>
* Changed occurrences of Z Research to Gluster.Vijay Bellur2009-10-071-1/+1
| | | | Signed-off-by: Anand V. Avati <avati@dev.gluster.com>
* write-behind: check for NULL file pointer in flush callbackAnand Avati2009-09-241-1/+2
| | | | | | | Signed-off-by: Anand V. Avati <avati@dev.gluster.com> 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.Raghavendra G2009-09-241-83/+104
| | | | | | | Signed-off-by: Anand V. Avati <avati@dev.gluster.com> 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 ↵Raghavendra G2009-09-241-1/+2
| | | | | | | | | | | | | | | | | request->stub->fop. - 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 <avati@dev.gluster.com> 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_fileRaghavendra G2009-09-231-27/+30
| | | | | | | | | | - this helps us to not traverse the request list whenever we need currently aggregated data in the queue Signed-off-by: Anand V. Avati <avati@dev.gluster.com> BUG: 276 (write behind needs to be optimized.) URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=276
* performance/write-behind: store the current window size in wb_file.Raghavendra G2009-09-231-44/+40
| | | | | | | | | | - this would increase the performance since we don't have to traverse the request list every time we need the current window size. Signed-off-by: Anand V. Avati <avati@dev.gluster.com> BUG: 276 (write behind needs to be optimized.) URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=276
* performance/write-behind: reduce usage of iov_length.Raghavendra G2009-09-231-47/+27
| | | | | | | | | | - request structure now holds a member write_size which is initialised at the time of request creation and used later. Signed-off-by: Anand V. Avati <avati@dev.gluster.com> BUG: 276 (write behind needs to be optimized.) URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=276
* performance/write-behind: add option "enable-trickling-writes".Raghavendra G2009-09-221-22/+41
| | | | | | | | | | | | | | - With this option enabled, writes are stack-wound even though not enough data is aggregated, provided there are no write-requests which are stack-wound but reply is yet to come. The reason behind this option is to make use of the network, which is relatively free (with no writes or replies in transit). However, with non-standard block-sizes of writes the performance can actually degrade. Hence making this configurable. Signed-off-by: Anand V. Avati <avati@dev.gluster.com> BUG: 276 (write behind needs to be optimized.) URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=276
* performance/write-behind: reduce traversal of request list during wb_mark_winds.Raghavendra G2009-09-221-35/+28
| | | | | | | | | | | | | | | | - move all the decision making code to __wb_can_wind. - don't continue traversing the request list, once we know any of the following conditions are true: * requests other than write are present in queue. * writes are happening at non-contiguous offsets. * there are no write requests, which are wound to server but not yet received the reply. * enough data is aggregated for writing. Signed-off-by: Anand V. Avati <avati@dev.gluster.com> BUG: 276 (write behind needs to be optimized.) URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=276
* performance/write-behind: reduce list-traversal during wb_mark_unwindsRaghavendra G2009-09-221-13/+19
| | | | | | | | | | - don't traverse entire request list to get the window-size, instead break when current window size becomes greater than configured limit. Signed-off-by: Anand V. Avati <avati@dev.gluster.com> BUG: 276 (write behind needs to be optimized.) URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=276
* performance/write-behind: remove redundant traversal of write-requests in ↵Raghavendra G2009-09-221-3/+5
| | | | | | | | | | | | the wind list in wb_sync. - no need of getting the total_count of number of requests in the list. Even if there is a single request, we need to sync it. Signed-off-by: Anand V. Avati <avati@dev.gluster.com> BUG: 276 (write behind needs to be optimized.) URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=276
* performance/write-behind: Aggregate adjacent contiguous write-buffers into ↵Raghavendra G2009-09-221-1/+77
| | | | | | | | | single iobuf. Signed-off-by: Anand V. Avati <avati@dev.gluster.com> BUG: 276 (write behind needs to be optimized.) URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=276
* performance/write-behind: fine-tune logic of wb_mark_windsRaghavendra G2009-09-221-65/+14
| | | | | | | | | | | | | | | - remove wb_mark_wind_aggregegate_size_aware, since wb_mark_wind_all does the same work (with check for whether current aggregated data size is greater than the configured limit before calling it). Moreover, wb_mark_wind_aggregate_size_aware called __wb_get_aggregate_size redundantly, thereby reducing the performance, since for small sized large number of writes, traversing the list of requests takes significant amount of time. Signed-off-by: Anand V. Avati <avati@dev.gluster.com> BUG: 276 (write behind needs to be optimized.) URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=276
* performance/write-behind: check for the presence of context only in fds not ↵Raghavendra G2009-09-221-6/+12
| | | | | | | | | opened on directories. Signed-off-by: Anand V. Avati <avati@dev.gluster.com> 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: hold locks when accessing members of wb_file.Raghavendra G2009-09-081-17/+75
| | | | | | | Signed-off-by: Anand V. Avati <avati@dev.gluster.com> BUG: 243 (Hold locks when accessing members of wb_file_t.) URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=243
* performance/write-behind: communicate back the errors in writes to servers ↵Raghavendra G2009-09-081-1/+12
| | | | | | | | | in the next immediate writes from application. Signed-off-by: Anand V. Avati <avati@dev.gluster.com> BUG: 242 (If any of the writes fail, write-behind should not wait till the fd is closed for reporting errors) URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=242
* write-behind: use O_ACCMODE while checking for O_RDONLY in flags.Raghavendra G2009-08-171-2/+2
| | | | | | | Signed-off-by: Anand V. Avati <avati@dev.gluster.com> BUG: 196 (write-behind window size getting set to 0.) URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=196
* write-behind: set default window-size to 1MB.Raghavendra G2009-07-071-1/+2
| | | | Signed-off-by: Anand V. Avati <avati@dev.gluster.com>
* performance/write-behind - bug fix in open() and create().Basavanagowda Kanur2009-07-021-1/+5
| | | | | | | | open() & create() calls should reset frame->local to NULL. bz# 104 Signed-off-by: Anand V. Avati <avati@dev.gluster.com>
* enhancement in write-behindAmar Tumballi2009-06-301-13/+22
| | | | | | | | | Write calls should not be pushed to background only when the mandatory locking is enabled, in all other cases (eg: O_SYNC, O_DIRECT etc), we should not be 'caching' any data, but the calls can be pushed to the background Signed-off-by: Anand V. Avati <avati@dev.gluster.com>
* write-behind: indentation and logging fixesRaghavendra G2009-04-301-158/+74
| | | | Signed-off-by: Anand V. Avati <avati@amp.gluster.com>
* write-behind aggregate-size related changesRaghavendra G2009-04-161-15/+76
| | | | | | | | | | | This patch brings in following changes: 1. make aggregate-size as non-configurable and make it to be equal to maximum iobuf size. 2. best effort to write data in chunks of length as close to aggregate-size as possible but not greater than aggregate-size, since aggregate-size is made equal to Maximum size of iobuf. Signed-off-by: Anand V. Avati <avati@amp.gluster.com>
* write-behind: adhere to coding guidelines.Raghavendra G2009-04-161-16/+32
| | | | | | - make sure lines are not greater than 80 characters in length Signed-off-by: Anand V. Avati <avati@amp.gluster.com>
* use ctx->page_size in all translators and transports instead of having their ↵Anand V. Avati2009-04-131-18/+0
| | | | | | own configurations Signed-off-by: Anand V. Avati <avati@amp.gluster.com>
* update performance/write-behind with new readv writev prototypesAnand V. Avati2009-04-121-18/+18
| | | | Signed-off-by: Anand V. Avati <avati@amp.gluster.com>
* wb_flush - keep reference on fd for process_frame to perform STACK_WIND of ↵Anand V. Avati2009-04-021-0/+4
| | | | | | | | flush. This patch fixes bug report by Greg <greg@easyflirt.com> on gluster-users@ with subject 'glusterfsd crash' Signed-off-by: Anand V. Avati <avati@amp.gluster.com>
* fixes crash in write-behindAmar Tumballi2009-03-221-2/+3
| | | | | | | in wb_flush, there was a chance that wb_process_queue() was called with NULL frame, which causes crash. Signed-off-by: Anand V. Avati <avati@amp.gluster.com>
* write behind preserves order of fops with respect to writesRaghavendra G2009-03-131-404/+947
| | | | | | | - the execution order of fops like read, stat, fsync, truncate etc whose results are affected by writes, are preserved. Signed-off-by: Anand V. Avati <avati@amp.gluster.com>
* updated copyright header to extend copyright upto 2009Basavanagowda Kanur2009-02-261-1/+1
| | | | | | updated copyright header to include 2009. Signed-off-by: Anand V. Avati <avati@amp.gluster.com>
* Added all filesVikas Gorur2009-02-183-0/+1459
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