Lustre devel - Jun 2007 - [Bug 12762] New: Extreme slowness during sanity.sh

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https://bugzilla.lustre.org/show_bug.cgi?id=12762



I''m seeing extreme slowness during parts of sanity.sh on b1_6,
approximately
once every 5 runs.  The first test where this is really apparent is 27m,
specifically during the "lfs setstripe" operations.  I have only been
able to
reproduce it during full acceptance-small runs (runtests then sanity) but that
may be due to its intermittent nature.

At Alex''s request, I reproduced the problem with mballoc off.

I will attach "lctl dk" logs produced by a slight change to sanity.sh
(I dump
the log immediately after each "lfs setstripe" in test 27m.  The only
other
thing I''ve noticed in dmesg is many instances of:

LustreError: 1419:0:(lov_request.c:677:lov_update_create_set()) error creating
fid 0x156 sub-object on OST idx 0/1: rc = -110

Sample slow run:
== test 27m: create file while OST0 was full =================== 17:49:52 (11822
03392)
dd: writing `/mnt/lustre/d27/f27m_1'': No space left on device
84242+0 records in
84241+0 records out
PASS (1306s)

Sample good run:
== test 27m: create file while OST0 was full =================== 17:37:32 (11822
02652)
dd: writing `/mnt/lustre/d27/f27m_1'': No space left on device
84246+0 records in
84245+0 records out
PASS (22s)