glusterfs.git/xlators/performance/readdir-ahead/src/Makefile.am, branch v3.8.6

build: export minimum symbols from xlators for correct resolution

2015-12-22T17:15:01+00:00

Revisiting http://review.gluster.org/#/c/11814/, which unintentionally
introduced warnings from libtool about the xlator .so names.

According to [1], the -module option must appear in the Makefile.am
file(s); if -module is defined in a macro, e.g. in configure(.ac),
then libtool will not recognize that this is a module and will emit a
warning.

[1]
http://www.gnu.org/software/automake/manual/automake.html#Libtool-Modules

Change-Id: Ifa5f9327d18d139597791c305aa10cc4410fb078
BUG: 1248669
Signed-off-by: Kaleb S KEITHLEY 
Reviewed-on: http://review.gluster.org/13003
Tested-by: NetBSD Build System 
Tested-by: Gluster Build System 
Reviewed-by: soumya k 
Reviewed-by: Niels de Vos

build: export minimum symbols from xlators for correct resolution

2015-09-24T14:37:42+00:00

We've been lucky that we haven't had any symbol collisions until now.
Now we have a collision between the snapview-client's svc_lookup() and
libntirpc's svc_lookup() with nfs-ganesha's FSAL_GLUSTER and libgfapi.

As a short term solution all the snapview-client's FOP methods were
changed to static scope. See http://review.gluster.org/11805. This
works in snapview-client because all the FOP methods are defined in
a single source file. This solution doesn't work for other xlators
with FOP methods defined in multiple source files.

To address this we link with libtool's '-export-symbols $symbol-file'
(a wrapper around `ld --version-script ...` --- on linux anyway) and
only export the minimum required symbols from the xlator sharedlib.

N.B. the libtool man page says that the symbol file should be named
foo.sym, thus the rename of *.exports to *.sym. While foo.exports
worked, we will follow the documentation.

Signed-off-by: Kaleb S. KEITHLEY 
BUG: 1248669
Change-Id: I1de68b3e3be58ae690d8bfb2168bfc019983627c
Reviewed-on: http://review.gluster.org/11814
Tested-by: NetBSD Build System 
Tested-by: Gluster Build System 
Reviewed-by: soumya k 
Reviewed-by: Niels de Vos

feature/performace: Fix broken build

2015-06-28T10:03:49+00:00

Fix the build broken because of patch
http://review.gluster.org/#/c/9822/

Change-Id: I0ee502c0fad5be87186c80ab4729036f52f85fa3
BUG: 1194640
Signed-off-by: Kotresh HR 
Reviewed-on: http://review.gluster.org/11451
Reviewed-by: Niels de Vos 
Tested-by: Niels de Vos

build: do not create versioned .so files

2014-03-22T00:28:15+00:00

There has been a misspelled option in the Makefile.am files. The option
is called -avoid-version, and not -avoidversion.

It is not trivial to provide a test-case for this. One way would be to
check generated RPMs with a command like this (output should be empty):

  $ rpm -qlp *.rpm | grep -E '/xlator/.+.so.0'

Change-Id: I2a6cc557eada4d098b73af5a254f8c75707543da
BUG: 1078365
Signed-off-by: Niels de Vos 
Reviewed-on: http://review.gluster.org/7299
Reviewed-by: Lalatendu Mohanty 
Reviewed-by: Kaleb KEITHLEY 
Tested-by: Gluster Build System

performance/readdir-ahead: introduce directory read-ahead translator

2013-09-04T16:04:15+00:00

This is a translator to improve the performance of typical,
sequential directory reads (i.e., ls). readdir-ahead begins
preloading the contents of a directory on open and serves readdir
requests from the preloaded content. readdir-ahead is currently
implemented to only handle the single threaded directory read
case.

readdir-ahead is currently disabled by default. It can be enabled
with the following command:

	gluster volume set  readdir-ahead on

The following are results of a getdents test on a single brick
volume.

Test info:

- Single VM, gluster client/server.
- Volume mounted with native client using --gid-timeout=2.
- getdents on single directory with 100k 0-byte files.

Test results:

- !readdir-ahead

read 3120080 bytes from offset 0
3 MiB, 4348 ops, 0:00:07.00 (416.590 KiB/sec and 594.4737 ops/sec)

- readdir-ahead

read 3120080 bytes from offset 0
3 MiB, 4348 ops, 0:00:03.00 (820.116 KiB/sec and 1170.3043 ops/sec)

BUG: 980517
Change-Id: Ieceb9e1eb47d1d5b5af8da2bf03839537364653f
Signed-off-by: Brian Foster 
Reviewed-on: http://review.gluster.org/4519
Tested-by: Gluster Build System 
Reviewed-by: Anand Avati