Jason Dillaman [Mon, 27 Oct 2014 18:47:19 +0000 (14:47 -0400)]
osdc: Constrain max number of in-flight read requests
Constrain the number of in-flight RADOS read requests to the
cache size. This reduces the chance of the cache memory
ballooning during certain scenarios like copy-up which can
invoke many concurrent read requests.
Fixes: #9854
Backport: giant, firefly, dumpling Signed-off-by: Jason Dillaman <dillaman@redhat.com>
Danny Al-Gaaf [Thu, 30 Oct 2014 02:14:41 +0000 (03:14 +0100)]
rados_sync.cc: fix xattr_diff() for the only_in_b checks
In the checks to build only_in_b up the wrong const_iterator x is
build up. it should compare rhs->xattrs with xattrs entries and
not twice rhs->xattrs.
Fix for:
CID 716957 (#1 of 1): Invalid iterator comparison (MISMATCHED_ITERATOR)
mismatched_comparison: Comparing x from rhs->xattrs to this->xattrs.end()
from this->xattrs.
Signed-off-by: Danny Al-Gaaf <danny.al-gaaf@bisect.de>
CID 717177 (#2-1 of 3): Uncaught exception (UNCAUGHT_EXCEPT)
root_function: In function main(int, char const **) an exception of
type ceph::FailedAssertion is thrown and never caught.
Signed-off-by: Danny Al-Gaaf <danny.al-gaaf@bisect.de>
Rongze Zhu [Fri, 10 Oct 2014 11:18:00 +0000 (19:18 +0800)]
crush: fix incorrect use of adjust_item_weight method
adjust_item_weight method will adjust all buckets which the item
inside. If the osd.0 in host=fake01 and host=fake02, we execute
"ceph osd crush osd.0 10 host=fake01", it not only will adjust fake01's
weight, but also will adjust fake02's weight.
the patch add adjust_item_weightf_in_loc method and fix remove_item,
_remove_item_under, update_item, insert_item, detach_bucket methods.
Introduce ceph_erasure_code_non_regression to check and compare how an
erasure code plugin encodes and decodes content with a given set of
parameters. For instance:
Will create an encoded object (--create) and store it into a directory
along with the chunks, one chunk per file. The directory name is derived
from the parameters. The content of the object is a random pattern of 31
bytes repeated to fill the object size specified with --stripe-width.
The check function (--check) reads the object back from the file,
encodes it and compares the result with the content of the chunks read
from the files. It also attempts recover from one or two erasures.
Chunks encoded by a given version of Ceph are expected to be encoded
exactly in the same way by all Ceph versions going forward.
Loic Dachary [Sun, 9 Nov 2014 02:23:06 +0000 (03:23 +0100)]
erasure-code: document pool operations
A short introduction to the first time user of an erasure coded pool.
It includes a reminder of how it relates to cache tiering and links to
define new profiles with an example.
There was examples in the developer documentation but the operator
expects to find such a guide in the rados operations chapter.
Loic Dachary [Wed, 22 Oct 2014 03:05:45 +0000 (20:05 -0700)]
tests: use kill -0 to check process existence
When killing a daemon, instead of using kill -9 to check the process was
terminated, use kill -0. Should the pid of the process be reused
immediately after, it would be wrong to kill the new process. Worst case
scenario the kill_daemon function returns before the process is
confirmed to be killed but this is not treated as an error and is
unlikely to cause any problem.
Loic Dachary [Sat, 18 Oct 2014 22:41:40 +0000 (15:41 -0700)]
tests: remove vstart_wrapped_tests.sh
Listing tests to be run in a single script does not take advantage of
parallel runs in make.
The vstart_wrapper.sh script is reworked and made less specialized and
let the caller decide which daemons to run via CEPH_START and does not
enforce the number of deamons of each time. It no longer uses stop.sh to
avoid killing the osd/mon/mds that are unrelated to the tests.
Greg Farnum [Thu, 6 Nov 2014 19:10:29 +0000 (11:10 -0800)]
MDS: clean up internal MDRequests the standard way
All cleanup is now routed through respond_to_request(),
which invokes the internal_op_finish Context*, then does
mdcache->request_finish(). This is easier to reason about,
and indeed fixes a bug (I was not cleaning up locks
following flush). Use the MDSContinuation to facilitate
this in scrub's case.
Greg Farnum [Fri, 29 Aug 2014 06:03:59 +0000 (23:03 -0700)]
MDCache: make scrub_dentry schedulable and reentrant
Rather than assuming that any necessary inodes are in the cache, split up
MDCache::scrub_dentry into setup and work phases. Add an internal_op_finisher()
to MDRequest. Dispatch any CEPH_MDS_OP_VALIDATE internal operations to
scrub_dentry_work(). Taken together, these make everything work properly when
path_traverse() (by way of rdlock_path_pin_ref()) needs to go to disk before
satisfying the lookup.
Greg Farnum [Wed, 27 Aug 2014 21:11:26 +0000 (14:11 -0700)]
MDCache: "handle" request_forward on internal ops
For now, just return -EXDEV ("Cross-device link") on internal ops that
require forwarding, as forwarding internal ops will require a great deal more
infrastructure.. But push the issue down to this level instead of worrying
about it in path_traverse, and consider the possibility that the MDRequest
might not have a client_request that it's wrapped around.
Greg Farnum [Thu, 21 Aug 2014 03:12:00 +0000 (20:12 -0700)]
Server: rename reply_request -> reply_client_request; make it private
The generic reply_request(MDRequest, int) is now the only caller. It's still
just building an MClientRequest to pass along, but we can change it a lot more
easily now to support responding to non-client requests.
Greg Farnum [Thu, 21 Aug 2014 02:47:00 +0000 (19:47 -0700)]
Server: use mdr->reply_extra_bl instead of explicit MClientReply
Set the MClientReply::extra_bl from reply_extra_bl unconditionally in
reply_request(), instead of only in early_reply(). Further isolate
the reply_request() callers from the use of MClientReply this way.
Greg Farnum [Fri, 1 Aug 2014 14:01:04 +0000 (07:01 -0700)]
Server: remove tracei and tracedn parameters from reply_request
We have members for these two parameters in the MDRequestImpl already, so
make use of them. This helps us move towards dropping the expectation of an
MClientRequest from functions like rdlock_path_pin_ref().
MDCache: add a scrub_dentry() function, and wire it up to the admin socket
scrub_dentry() is passed a string path, and it validates it before replying. We
hook up an admin socket command "scrub_path" to call it and dump the output.
Add a function that will validate the on-disk state of the CInode. We currently
check that the on-disk backtrace matches (or is older) and compare rstats on
dirfrags against the parent dir's inode (for directories only).
TODO: validate that the on-disk Inode object matches what the parent
directory holds.
It's using a sort-of new programming model, trying to stuff stack data into
a Continuation object and write everything sequentially instead of having
a function and Context per IO.
Signed-off-by: Greg Farnum <greg@inktank.com> Signed-off-by: John Spray <john.spray@redhat.com>
Greg Farnum [Wed, 5 Nov 2014 22:23:32 +0000 (14:23 -0800)]
Rebase: MDS: Add an MDSContinuation for ease of use
Unlike the regular Continuation, this one works in terms of an MDRequest
and has wrappers to provide Context callbacks that are either
internal MDS or IO appropriate.
Greg Farnum [Wed, 1 Oct 2014 00:03:24 +0000 (17:03 -0700)]
MDCache: create_unlinked_system_inode() as the guts of create_system_inode()
This way we can create duplicate CInodes without actually linking them
into the cache. It'll be helpful for comparing different versions of
disk states and in-memory state, etc.
mdstypes: add a same_sums() function to nest_info_t
operator== is checking equality of the version as well, but I want
something I can use to check that the internal sums match. This is useful
for eg comparing the sums of a set of dirfrags to the tally stored in
the inode.
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