glusterfs.git/xlators/cluster/dht/src/dht-diskusage.c, branch v3.6.4

dht: support heterogeneous brick sizes

2014-07-12T16:20:52+00:00

Calculation of layouts now considers the size of each brick, so that
smaller bricks don't get an "unfair" share of allocations and start
returning ENOSPC while the larger bricks still have plenty of space.

The observation has been made that some clients might get ENOTCONN when
trying to fetch disk-size information, and end up calculating layouts
differently.  The following meta-observations can be made.

(1) This scenario is extremely unlikely in configurations with AFR.

(2) The most likely consequence of this scenario is that some files will
be placed sub-optimally by the client with the obsolete (non-weighted)
layout.  They'll still be found anyway, so this isn't a show stopper.

(3) Without this patch it's *guaranteed* that some files will be placed
sub-optimally, because any layout that fails to account for brick sizes
is sub-optimal.

(4) We shouldn't be doing fix-layout from two nodes simultaneously
anyway.  That's inefficient at best.  Any instances of such behavior are
separate bugs, which should be fixed separately.

(5) In the most extreme edge case, two nodes doing weighted and
non-weighted layout fixes could race and end up creating an internally
inconsistent layout.  This condition is still transient; it will be
detected and repaired automatically the next time anyone fetches the
layout.  (If it's not that's also a preexisting bug that can show up in
other contexts.)

In conclusion, it's not the purpose of this patch to fix bugs elsewhere
in DHT.  Its purpose is to make life incrementally better for users who
add new hardware with larger disks etc. than the older equipment.  It's
only one part of an ongoing process to improve layout management and
repair, all the way up to support for multiple hash rings or tiering.

Change-Id: I05eb6f9eface9cdaf8622e0260c8c7f29020447f
BUG: 1114680
Signed-off-by: Jeff Darcy 
Reviewed-on: http://review.gluster.org/8093
Tested-by: Gluster Build System 
Reviewed-by: Raghavendra G 
Reviewed-by: Shyamsundar Ranganathan 
Reviewed-by: Vijay Bellur

Cluster/DHT: New logging framework

2014-06-16T13:25:51+00:00

Moved all relevant DHT gf_log calls to the new logging
framework.

Change-Id: I3af3cfe0416e332774a6c4ff6a091d006c400af2
BUG: 1075611
Signed-off-by: Nithya Balachandran 
Reviewed-on: http://review.gluster.org/7929
Tested-by: Gluster Build System 
Reviewed-by: Vijay Bellur

cluster/dht: Fix min-free-disk calculations when quota-deem-statfs is on

2014-06-02T10:56:46+00:00

PROBLEM:

As part of file creation, DHT sends a statfs call to all of its
sub-volumes and expects in return the local space consumption and
availability on each one of them. This information is used by DHT to
ensure that atleast min-free-disk amount of space is left on each
sub-volume in the event that there ARE other sub-volumes with more
space available.
But when quota-deem-statfs is enabled, quota xlator on every brick
unwinds the statfs call with volume-wide consumption of disk space.
This leads to miscalculation in min-free-disk algo, thereby misleading
DHT at some point, into thinking all sub-volumes have equal available
space, in which case DHT keeps sending new file creates to subvol-0,
causing it to become 100% full at some point although there ARE other
subvols with ample space available.

FIX:

The fix is to make quota_statfs() behave as if quota xlator weren't
enabled, thereby making every brick return only its local consumption
and disk space availability.

Change-Id: I211371a1eddb220037bd36a128973938ea8124c2
BUG: 1099890
Signed-off-by: Krutika Dhananjay 
Reviewed-on: http://review.gluster.org/7845
Tested-by: Gluster Build System 
Reviewed-by: Raghavendra G 
Reviewed-by: Vijay Bellur

cluster/dht: Ignore subvols with error in min-free-disk/inodes

2013-07-10T08:56:38+00:00

Currently when selecting a alternative subvolume when hashed
subvol has exceeded min-free-disk/inodes, we do not check if
layouts have errors (including decommissioning). This leads
to data being written to those subvolumes, and in case of
decommissioning, will lead to data loss.

Change-Id: Ie0c6cf4a29d7c53d8a6d8a8c1bd595cf58a0012a
BUG: 982919
Signed-off-by: shishir gowda 
Reviewed-on: http://review.gluster.org/5299
Tested-by: Gluster Build System 
Reviewed-by: Vijay Bellur

cluster/dht: Correct min_free_disk behaviour

2013-02-04T16:43:50+00:00

Problem:
Files were being created in subvol which had less than
min_free_disk available even in the cases where other
subvols with more space were available.

Solution:
Changed the logic to look for subvol which has more
space available.
In cases where all the subvols have lesser than
Min_free_disk available , the one with max space and
atleast one inode is available.

Known Issue: Cannot ensure that first file that is
created right after min-free-value is crossed on a
brick will get created in other brick because disk
usage stat takes some time to update in glusterprocess.
Will fix that as part of another bug.

Change-Id: If3ae0bf5a44f8739ce35b3ee3f191009ddd44455
BUG: 858488
Signed-off-by: Raghavendra Talur 
Reviewed-on: http://review.gluster.org/4420
Tested-by: Gluster Build System 
Reviewed-by: Anand Avati

license: dual license under GPLV2 and LGPLV3+

2012-05-11T05:06:16+00:00

Note that the license was not changed in any of the following:
	.../argp-standalone/...
        .../booster/...
        .../cli/...
        .../contrib/...
        .../extras/...
        .../glusterfsd/...
        .../glusterfs-hadoop/...
        .../mod_clusterfs/...
        .../scheduler/...
        .../swift/...

The license was not changed in any of the non-building xlators. The
license was not changed in any of the xlators that seemed — to me — to
be clearly server-side only, e.g. protocol/server

Note too that copyright was changed along with the license; I did
not change the copyright in files where the license did not change.

If you find any errors or ommissions please don't hesitate to let me know.

The complete list of files with the license change is:
	libglusterfs/src/byte-order.h
	libglusterfs/src/call-stub.c
	libglusterfs/src/call-stub.h
	libglusterfs/src/checksum.c
	libglusterfs/src/checksum.h
	libglusterfs/src/circ-buff.c
	libglusterfs/src/circ-buff.h
	libglusterfs/src/common-utils.c
	libglusterfs/src/common-utils.h
	libglusterfs/src/compat-errno.c
	libglusterfs/src/compat-errno.h
	libglusterfs/src/compat.c
	libglusterfs/src/compat.h
	libglusterfs/src/daemon.c
	libglusterfs/src/daemon.h
	libglusterfs/src/defaults.c
	libglusterfs/src/defaults.h
	libglusterfs/src/dict.c
	libglusterfs/src/dict.h
	libglusterfs/src/event-history.c
	libglusterfs/src/event-history.h
	libglusterfs/src/event.c
	libglusterfs/src/event.h
	libglusterfs/src/fd-lk.c
	libglusterfs/src/fd-lk.h
	libglusterfs/src/fd.c
	libglusterfs/src/fd.h
	libglusterfs/src/gf-dirent.c
	libglusterfs/src/gf-dirent.h
	libglusterfs/src/globals.c
	libglusterfs/src/globals.h
	libglusterfs/src/glusterfs.h
	libglusterfs/src/graph-print.c
	libglusterfs/src/graph-utils.h
	libglusterfs/src/graph.c
	libglusterfs/src/hashfn.c
	libglusterfs/src/hashfn.h
	libglusterfs/src/iatt.h
	libglusterfs/src/inode.c
	libglusterfs/src/inode.h
	libglusterfs/src/iobuf.c
	libglusterfs/src/iobuf.h
	libglusterfs/src/latency.c
	libglusterfs/src/latency.h
	libglusterfs/src/list.h
	libglusterfs/src/lkowner.h
	libglusterfs/src/locking.h
	libglusterfs/src/logging.c
	libglusterfs/src/logging.h
	libglusterfs/src/mem-pool.c
	libglusterfs/src/mem-pool.h
	libglusterfs/src/mem-types.h
	libglusterfs/src/options.c
	libglusterfs/src/options.h
	libglusterfs/src/rbthash.c
	libglusterfs/src/rbthash.h
	libglusterfs/src/run.c
	libglusterfs/src/run.h
	libglusterfs/src/scheduler.c
	libglusterfs/src/scheduler.h
	libglusterfs/src/stack.c
	libglusterfs/src/stack.h
	libglusterfs/src/statedump.c
	libglusterfs/src/statedump.h
	libglusterfs/src/syncop.c
	libglusterfs/src/syncop.h
	libglusterfs/src/syscall.c
	libglusterfs/src/syscall.h
	libglusterfs/src/timer.c
	libglusterfs/src/timer.h
	libglusterfs/src/trie.c
	libglusterfs/src/trie.h
	libglusterfs/src/xlator.c
	libglusterfs/src/xlator.h
	libglusterfsclient/src/libglusterfsclient-dentry.c
	libglusterfsclient/src/libglusterfsclient-internals.h
	libglusterfsclient/src/libglusterfsclient.c
	libglusterfsclient/src/libglusterfsclient.h
	rpc/rpc-lib/src/auth-glusterfs.c
	rpc/rpc-lib/src/auth-null.c
	rpc/rpc-lib/src/auth-unix.c
	rpc/rpc-lib/src/protocol-common.h
	rpc/rpc-lib/src/rpc-clnt.c
	rpc/rpc-lib/src/rpc-clnt.h
	rpc/rpc-lib/src/rpc-transport.c
	rpc/rpc-lib/src/rpc-transport.h
	rpc/rpc-lib/src/rpcsvc-auth.c
	rpc/rpc-lib/src/rpcsvc-common.h
	rpc/rpc-lib/src/rpcsvc.c
	rpc/rpc-lib/src/rpcsvc.h
	rpc/rpc-lib/src/xdr-common.h
	rpc/rpc-lib/src/xdr-rpc.c
	rpc/rpc-lib/src/xdr-rpc.h
	rpc/rpc-lib/src/xdr-rpcclnt.c
	rpc/rpc-lib/src/xdr-rpcclnt.h
	rpc/rpc-transport/rdma/src/name.c
	rpc/rpc-transport/rdma/src/name.h
	rpc/rpc-transport/rdma/src/rdma.c
	rpc/rpc-transport/rdma/src/rdma.h
	rpc/rpc-transport/socket/src/name.c
	rpc/rpc-transport/socket/src/name.h
	rpc/rpc-transport/socket/src/socket.c
	rpc/rpc-transport/socket/src/socket.h
	xlators/cluster/afr/src/afr-common.c
	xlators/cluster/afr/src/afr-dir-read.c
	xlators/cluster/afr/src/afr-dir-read.h
	xlators/cluster/afr/src/afr-dir-write.c
	xlators/cluster/afr/src/afr-dir-write.h
	xlators/cluster/afr/src/afr-inode-read.c
	xlators/cluster/afr/src/afr-inode-read.h
	xlators/cluster/afr/src/afr-inode-write.c
	xlators/cluster/afr/src/afr-inode-write.h
	xlators/cluster/afr/src/afr-lk-common.c
	xlators/cluster/afr/src/afr-mem-types.h
	xlators/cluster/afr/src/afr-open.c
	xlators/cluster/afr/src/afr-self-heal-algorithm.c
	xlators/cluster/afr/src/afr-self-heal-algorithm.h
	xlators/cluster/afr/src/afr-self-heal-common.c
	xlators/cluster/afr/src/afr-self-heal-common.h
	xlators/cluster/afr/src/afr-self-heal-data.c
	xlators/cluster/afr/src/afr-self-heal-entry.c
	xlators/cluster/afr/src/afr-self-heal-metadata.c
	xlators/cluster/afr/src/afr-self-heal.h
	xlators/cluster/afr/src/afr-self-heald.c
	xlators/cluster/afr/src/afr-self-heald.h
	xlators/cluster/afr/src/afr-transaction.c
	xlators/cluster/afr/src/afr-transaction.h
	xlators/cluster/afr/src/afr.c
	xlators/cluster/afr/src/afr.h
	xlators/cluster/afr/src/pump.c
	xlators/cluster/afr/src/pump.h
	xlators/cluster/dht/src/dht-common.c
	xlators/cluster/dht/src/dht-common.h
	xlators/cluster/dht/src/dht-diskusage.c
	xlators/cluster/dht/src/dht-hashfn.c
	xlators/cluster/dht/src/dht-helper.c
	xlators/cluster/dht/src/dht-inode-read.c
	xlators/cluster/dht/src/dht-inode-write.c
	xlators/cluster/dht/src/dht-layout.c
	xlators/cluster/dht/src/dht-linkfile.c
	xlators/cluster/dht/src/dht-mem-types.h
	xlators/cluster/dht/src/dht-rebalance.c
	xlators/cluster/dht/src/dht-rename.c
	xlators/cluster/dht/src/dht-selfheal.c
	xlators/cluster/dht/src/dht.c
	xlators/cluster/dht/src/nufa.c
	xlators/cluster/dht/src/switch.c
	xlators/cluster/stripe/src/stripe-helpers.c
	xlators/cluster/stripe/src/stripe-mem-types.h
	xlators/cluster/stripe/src/stripe.c
	xlators/cluster/stripe/src/stripe.h
	xlators/features/index/src/index-mem-types.h ¹
	xlators/features/index/src/index.c ¹
	xlators/features/index/src/index.h ¹
	xlators/performance/io-cache/src/io-cache.c
	xlators/performance/io-cache/src/io-cache.h
	xlators/performance/io-cache/src/ioc-inode.c
	xlators/performance/io-cache/src/ioc-mem-types.h
	xlators/performance/io-cache/src/page.c
	xlators/performance/io-threads/src/io-threads.c
	xlators/performance/io-threads/src/io-threads.h
	xlators/performance/io-threads/src/iot-mem-types.h
	xlators/performance/md-cache/src/md-cache-mem-types.h
	xlators/performance/md-cache/src/md-cache.c
	xlators/performance/quick-read/src/quick-read-mem-types.h
	xlators/performance/quick-read/src/quick-read.c
	xlators/performance/quick-read/src/quick-read.h
	xlators/performance/read-ahead/src/page.c
	xlators/performance/read-ahead/src/read-ahead-mem-types.h
	xlators/performance/read-ahead/src/read-ahead.c
	xlators/performance/read-ahead/src/read-ahead.h
	xlators/performance/symlink-cache/src/symlink-cache.c
	xlators/performance/write-behind/src/write-behind-mem-types.h
	xlators/performance/write-behind/src/write-behind.c
	xlators/protocol/auth/addr/src/addr.c ¹
	xlators/protocol/auth/login/src/login.c ¹
	xlators/protocol/client/src/client-callback.c
	xlators/protocol/client/src/client-handshake.c
	xlators/protocol/client/src/client-helpers.c
	xlators/protocol/client/src/client-lk.c
	xlators/protocol/client/src/client-mem-types.h
	xlators/protocol/client/src/client.c
	xlators/protocol/client/src/client.h
	xlators/protocol/client/src/client3_1-fops.c

¹ Copyright only, license reverted to original

Change-Id: If560e826c61b6b26f8b9af7bed6e4bcbaeba31a8
BUG: 820551
Signed-off-by: Kaleb KEITHLEY 
Reviewed-on: http://review.gluster.com/3304
Tested-by: Gluster Build System 
Reviewed-by: Vijay Bellur

core: adding extra data for fops

2012-03-22T23:40:27+00:00

with this change, the xlator APIs will have a dictionary as extra
argument, which is passed between all the layers. This can be
utilized for overloading in some of the operations.

Change-Id: I58a8186b3ef647650280e63f3e5e9b9de7827b40
Signed-off-by: Amar Tumballi 
BUG: 782265
Reviewed-on: http://review.gluster.com/2960
Tested-by: Gluster Build System 
Reviewed-by: Anand Avati

cluster/distribute: send the proper 'loc_t' for statfs()

2012-02-19T09:35:49+00:00

in dht-diskusage.c, which was getting used for getting free disk
space of all subvolumes

Change-Id: Ieb2bb5f2479fac1803b9af4ef1948954a026c2ee
Signed-off-by: Amar Tumballi 
BUG: 290282
Reviewed-on: http://review.gluster.com/2767
Tested-by: Gluster Build System 
Reviewed-by: Vijay Bellur

cluster/distribute: Add support for 'min-free-inodes' on each distribute subvolume.

2011-11-23T12:16:16+00:00

This change is required as increasingly large number of small files
would cause inodes to run out before they run out on available disk space.
It is highly necessary to support algorithmic checking of inodes too
just as we do for disk space.

Change-Id: I9b87405328d443825e239ee80ab664aceb50ee68
BUG: 3799
Signed-off-by: Harshavardhana 
Reviewed-on: http://review.gluster.com/730
Tested-by: Gluster Build System 
Reviewed-by: Jeff Darcy 
Reviewed-by: Amar Tumballi

Move some of the messages to log level `TRACE'.

2011-11-16T07:30:22+00:00

Change-Id: I46133b5e2218b9d810251b3dadadd8f157ab07d7
BUG: 3761
Reviewed-on: http://review.gluster.com/643
Tested-by: Gluster Build System 
Reviewed-by: Amar Tumballi