glusterfs.git/xlators/features/changetimerecorder/src, branch v3.8dev

ctr : Fix for heating of files during promotion/demotion

2015-04-08T10:29:58+00:00

This fix will solve the heating of the files during the promotion
or demotion.
Promotion:
~~~~~~~~~
When a file gets promoted it get the current time stamp
 during creation only, but following writes or reads during the
migration wont heat the file.
Demotion:
~~~~~~~~
When a file gets demoted it get the wind/unwind time stamp is set to
zero. The following writes or reads during the migration wont heat
the file.

What is remaining ?
~~~~~~~~~~~~~~~~~
Bug 1209129 ( https://bugzilla.redhat.com/show_bug.cgi?id=1209129 )
Inspite of this fix there is still a issue remaining, i.e the heat of
the file is not keep intact during a internal rebalance activity i.e
a rebalance within a tier.

Change-Id: I01e82dc226355599732d40e699062cee7960b0a5
BUG: 1207867
Signed-off-by: Joseph Fernandes 
Signed-off-by: Dan Lambright 
Signed-off-by: Joseph Fernandes 
Reviewed-on: http://review.gluster.org/10080
Reviewed-by: Shyamsundar Ranganathan 
Tested-by: Gluster Build System

cluster/dht: fix tier.c problems found prior to feature freeze

2015-04-06T09:35:37+00:00

This patch resolves tiering translator issues taken from the list
in bug 1203776. These issues have been selected to be fixed
first. The rest will be fixed in a subsequent patch (or are not a
problem).

3. Replace hardcoded #defines of promote/demote file names

6. Use loc_wipe() in migrate_using_query_file()

9. Only promote/demote files on the same node on which they reside.

14. Replace calloc with GF_CALLOC in tier.c and ensure freeing done
properly.

15. Handle if parse_query_str fails

22. Only load gfdb library on server side, remove SQL references
    from client.

Change-Id: I6563b11e58ab2e4c6b1ce44db755781ad6d930fb
BUG: 1203776
Signed-off-by: Dan Lambright 
Reviewed-on: http://review.gluster.org/9987
Tested-by: Gluster Build System 
Reviewed-by: N Balachandran 
Reviewed-by: Niels de Vos

Avoid conflict between contrib/uuid and system uuid

2015-04-04T17:48:35+00:00

glusterfs relies on Linux uuid implementation, which
API is incompatible with most other systems's uuid. As
a result, libglusterfs has to embed contrib/uuid,
which is the Linux implementation, on non Linux systems.
This implementation is incompatible with systtem's
built in, but the symbols have the same names.

Usually this is not a problem because when we link
with -lglusterfs, libc's symbols are trumped. However
there is a problem when a program not linked with
-lglusterfs will dlopen() glusterfs component. In
such a case, libc's uuid implementation is already
loaded in the calling program, and it will be used
instead of libglusterfs's implementation, causing
crashes.

A possible workaround is to use pre-load libglusterfs
in the calling program (using LD_PRELOAD on NetBSD for
instance), but such a mechanism is not portable, nor
is it flexible. A much better approach is to rename
libglusterfs's uuid_* functions to gf_uuid_* to avoid
any possible conflict. This is what this change attempts.

BUG: 1206587
Change-Id: I9ccd3e13afed1c7fc18508e92c7beb0f5d49f31a
Signed-off-by: Emmanuel Dreyfus 
Reviewed-on: http://review.gluster.org/10017
Tested-by: Gluster Build System 
Reviewed-by: Niels de Vos

features/ctr: Removing rpc-lib, rpc-xdr and api from CPPFLAGS

2015-03-25T19:02:27+00:00

Changetimerecorder doesn't seem to use rpc-lib, rpc-xdr
and gfapi in the source. So removing those from Makefile.am

Change-Id: I21c71db6212c10ba3821c6c456958a45c5312d41
BUG: 1198849
Signed-off-by: Anoop C S 
Reviewed-on: http://review.gluster.org/9997
Reviewed-by: Joseph Fernandes 
Tested-by: Gluster Build System 
Reviewed-by: Niels de Vos

tiering/CTR:build CTR only if tiering is enabled

2015-03-20T16:47:57+00:00

Thanks to Niels for this fix

Change-Id: I9a13c3de3ed5d4eb06c6af61a2519bf27f1b6259
BUG: 1194753
Signed-off-by: Mohammed Rafi KC 
Reviewed-on: http://review.gluster.org/9957
Reviewed-by: Niels de Vos 
Tested-by: Gluster Build System 
Reviewed-by: Kaleb KEITHLEY

build: pass the correct CFLAGS and LDFLAGS when linking (to) libgfdb

2015-03-19T20:16:54+00:00

Change-Id: Id9a7d0f457d9759ab7d0a52a4000b5ae36d211f8
BUG: 1194753
Signed-off-by: Niels de Vos 
Reviewed-on: http://review.gluster.org/9946
Tested-by: Gluster Build System 
Reviewed-by: Kaleb KEITHLEY

Adding ChangeTimeRecorder(CTR) Xlator to GlusterFS

2015-03-19T08:31:29+00:00

**********************************************************************
                            ChangeTimeRecorder(CTR) Xlator           |
**********************************************************************
ChangeTimeRecorder(CTR) is server side xlator(translator) which sits
just above posix xlator. The main role of this xlator is to record the
access/write patterns on a file residing the brick. It records the
read(only data) and write(data and metadata) times and also count on
how many times a file is read or written. This xlator also captures
the hard links to a file(as its required by data tiering to move
files).

CTR Xlator is the consumer of libgfdb.

To Enable/Disable CTR Xlator:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~

 gluster volume set  features.ctr-enabled {on/off}

To Enable/Disable Frequency Counter Recording in CTR Xlator:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

 gluster volume set  features.record-counters {on/off}

Change-Id: I5d3cf056af61ac8e3f8250321a27cb240a214ac2
BUG: 1194753
Signed-off-by: Joseph Fernandes 
Reviewed-on: http://review.gluster.org/9935
Tested-by: Gluster Build System 
Reviewed-by: Vijay Bellur