[Bugs] [Bug 1229233] Data Tiering:3.7.0:data loss:detach-tier not flushing data to cold-tier

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https://bugzilla.redhat.com/show_bug.cgi?id=1229233



--- Comment #10 from nchilaka <nchilaka at redhat.com> ---
I Have tried the validation on a tier volume with hot layer as distribute and
cold as disperse. The data gets flushed but i see following errors in rebalance
log of the volume
[2015-06-29 09:42:56.872045] E [MSGID: 109023]
[dht-rebalance.c:553:__dht_rebalance_create_dst_file] 0-vol1-tier-dht:
ftruncate failed for /coldir/hotf on vol1-cold-dht (Input/output error)
[2015-06-29 09:42:56.872082] E [MSGID: 108008]
[afr-transaction.c:1984:afr_transaction] 0-vol1-cold-replicate-0: Failing
FSETATTR on gfid 00000000-0000-0000-0000-000000000000: split-brain observed.
[Input/output error]
[2015-06-29 09:42:56.872342] E [MSGID: 109023]
[dht-rebalance.c:562:__dht_rebalance_create_dst_file] 0-vol1-tier-dht: chown
failed for /coldir/hotf on vol1-cold-dht (Input/output error)
[2015-06-29 09:42:56.875000] E [MSGID: 109039]
[dht-helper.c:1162:dht_rebalance_inprogress_task] 0-vol1-hot-dht: /coldir/hotf:
failed to get the 'linkto' xattr [No data available]
[2015-06-29 09:42:56.875321] E [MSGID: 109023]
[dht-rebalance.c:792:__dht_rebalance_open_src_file] 0-vol1-tier-dht: failed to
set xattr on /coldir/hotf in vol1-hot-dht (Invalid argument)
[2015-06-29 09:42:56.875335] E [MSGID: 109023]
[dht-rebalance.c:1098:dht_migrate_file] 0-vol1-tier-dht: Migrate file failed:
failed to open /coldir/hotf on vol1-hot-dht
[2015-06-29 09:42:56.875794] I [MSGID: 109028]
[dht-rebalance.c:3029:gf_defrag_status_get] 0-vol1-tier-dht: Rebalance is
completed. Time taken is 0.00 secs
[2015-06-29 09:42:56.875816] I [MSGID: 109028]
[dht-rebalance.c:3033:gf_defrag_status_get] 0-vol1-tier-dht: Files migrated: 0,
size: 0, lookups: 9, failures: 0, skipped: 3



Failing to set an xattr seems to be valid, as ecvolume doesnt have hashranges,
I suppose.

>From a sanity perspective the ecvol data flushing seems to work

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