glusterfs.git/xlators/cluster/ec/src/ec-dir-read.c, branch v4.0.1

cluster/ec: OpenFD heal implementation for EC

2018-01-05T06:55:44+00:00

Existing EC code doesn't try to heal the OpenFD to
avoid unnecessary healing of the data later.

Fix implements the healing of open FDs before
carrying out file operations on them by making an
attempt to open the FDs on required up nodes.

BUG: 1431955
Change-Id: Ib696f59c41ffd8d5678a484b23a00bb02764ed15
Signed-off-by: Sunil Kumar Acharya

cluster/ec: Allow parallel writes in EC if possible

2017-10-24T09:30:25+00:00

Problem:
Ec at the moment sends one modification fop after another, so if some of
the disks become slow, for a while then the wait time for the writes that
are waiting in the queue becomes really bad.

Fix:
Allow parallel writes when possible. For this we need to make 3 changes.
1) Each fop now has range parameters they will be updating.
2) Xattrop is changed to handle parallel xattrop requests where some
   would be modifying just dirty xattr.
3) Fops that refer to size now take locks and update the locks.

Fixes #251
Change-Id: Ibc3c15372f91bbd6fb617f0d99399b3149fa64b2
Signed-off-by: Pranith Kumar K

cluster/ec: Add support for hardware acceleration

2016-09-08T17:08:25+00:00

This patch implements functionalities for fast encoding/decoding
using hardware support. Currently optimized x86_64, SSE and AVX is
added.

Additionally this patch implements a caching mecanism for inverse
matrices to reduce computation time, as well as a new method for
computing the inverse that takes quadratic time instead of cubic.

Finally some unnecessary memory copies have been eliminated to
further increase performance.

Change-Id: I26c75f26fb4201bd22b51335448ea4357235065a
BUG: 1289922
Signed-off-by: Xavier Hernandez 
Reviewed-on: http://review.gluster.org/12837
Tested-by: Pranith Kumar Karampuri 
Smoke: Gluster Build System 
NetBSD-regression: NetBSD Build System 
CentOS-regression: Gluster Build System 
Reviewed-by: Pranith Kumar Karampuri

cluster/ec: Use locks for opendir

2016-08-25T13:48:33+00:00

Problem:
In some cases we see that readdir keeps winding to the brick that doesn't have
any blocked locks i.e. first brick. This is leading to the client assuming that
there are no blocking locks on the inode so it won't give away the lock. Other
clients end up blocked on the lock as if the command hung.

Fix:
Proper way to fix this issue is to use infra present in
http://review.gluster.org/14736 This is a stop gap fix where we start taking
inodelks in opendir which goes to all the bricks, this will detect if there is
any contention.

BUG: 1346719
Change-Id: I91109107a26f6535b945ac476338e9f21dc31eb9
Signed-off-by: Pranith Kumar K 
Reviewed-on: http://review.gluster.org/15309
Smoke: Gluster Build System 
CentOS-regression: Gluster Build System 
NetBSD-regression: NetBSD Build System 
Reviewed-by: Ashish Pandey

cluster/ec: Allow read fops to be processed in parallel

2015-08-29T10:55:28+00:00

Currently ec only sends a single read request at a time for a given
inode. Since reads do not interfere between them, this patch allows
multiple concurrent read requests to be sent in parallel.

Change-Id: If853430482a71767823f39ea70ff89797019d46b
BUG: 1245689
Signed-off-by: Xavier Hernandez 
Reviewed-on: http://review.gluster.org/11742
Tested-by: NetBSD Build System 
Reviewed-by: Pranith Kumar Karampuri 
Tested-by: Gluster Build System

cluster/ec: Fix tracking of good bricks

2015-08-06T17:12:22+00:00

The bitmask of good and bad bricks was kept in the context of the
corresponding inode or fd. This was problematic when an external
process (another client or the self-heal process) did heal the
bricks but no one changed the bitmaks of other clients.

This patch removes the bitmask stored in the context and calculates
which bricks are healthy after locking them and doing the initial
xattrop. After that, it's updated using the result of each fop.

Change-Id: I225e31cd219a12af4ca58871d8a4bb6f742b223c
BUG: 1236065
Signed-off-by: Xavier Hernandez 
Reviewed-on: http://review.gluster.org/11844
Tested-by: NetBSD Build System 
Tested-by: Gluster Build System 
Reviewed-by: Pranith Kumar Karampuri

cluster/ec: Minimize usage of EIO error

2015-07-28T11:12:17+00:00

Change-Id: I82e245615419c2006a2d1b5e94ff0908d2f5e891
BUG: 1245276
Signed-off-by: Xavier Hernandez 
Reviewed-on: http://review.gluster.org/11741
Tested-by: Gluster Build System 
Reviewed-by: Pranith Kumar Karampuri 
Tested-by: NetBSD Build System

cluster/ec: wind readlink on good subvol(s)

2015-07-14T11:14:38+00:00

BUG: 1232172
Change-Id: I3a56e487840d86147dd85bf5fbe79b165eae289f
Signed-off-by: Pranith Kumar K 
Reviewed-on: http://review.gluster.org/11589
Tested-by: NetBSD Build System 
Reviewed-by: Xavier Hernandez 
Tested-by: Gluster Build System

cluster/ec: Remove locks in opendir

2015-07-08T07:06:26+00:00

With readdir[p] taking locks to figure out which bricks are
good/bad, no need to take any locks on opendir.

BUG: 1232172
Change-Id: I4d924aeeaecab23af08c4598548a20d2a44cd849
Signed-off-by: Pranith Kumar K 
Reviewed-on: http://review.gluster.org/11506
Reviewed-by: Xavier Hernandez 
Tested-by: NetBSD Build System 
Tested-by: Gluster Build System

ec: Porting messages to new logging framework

2015-06-26T15:51:59+00:00

Change-Id: Ia05ae750a245a37d48978e5f37b52f4fb0507a8c
BUG: 1194640
Signed-off-by: Nandaja Varma 
Reviewed-on: http://review.gluster.org/10465
Tested-by: NetBSD Build System 
Reviewed-by: Xavier Hernandez