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Ceph is a distributed object, block, and file storage platform
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Sage Weil 0aa18f32e8 mds: do not shift to EXCL or MIX while rdlocked 
There was an old change in file_eval() that was allowing us to switch from
SYNC to MIX or EXCL while there were rdlocks, which either caused lots of
lock thrashing or could (I think) hang things up completely.  This was
from ea10a672, an ancient fix for something related that appears to have
taken out the rdlocked check by accident.

In my tests (one writer, one stat-er), this took things from long stalls
(up to 20 seconds) to very responsive stats.  Yay!

Fixes: 
Signed-off-by: Sage Weil <sage.weil@dreamhost.com>
2011-05-25 09:38:06 -07:00
debian v0.28.1 2011-05-23 21:11:44 -07:00
fusetrace
man man: update cosd man page 2011-05-18 11:45:46 -07:00
qa automake: Make debug targets known but not built by default in non-debug builds. 2011-04-27 12:16:52 -07:00
src mds: do not shift to EXCL or MIX while rdlocked 2011-05-25 09:38:06 -07:00
udev debian: add udev rules 2011-03-10 16:08:39 -08:00
wireshark
.gitignore Make git ignore stamp files from debian build. 2011-03-07 11:33:33 -08:00
AUTHORS
autogen.sh
ceph.spec.in ceph.spec.in: add obsync 2011-05-17 14:26:30 -07:00
ChangeLog
configure.ac v0.28.1 2011-05-23 21:11:44 -07:00
COPYING
do_autogen.sh do_autogen: add -H for --with-hadoop 2011-04-25 11:05:43 -07:00
INSTALL
Makefile.am debian: add udev rules 2011-03-10 16:08:39 -08:00
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README 

Ceph - a scalable distributed file system
-----------------------------------------

Please see http://ceph.newdream.net/ for current info.

----

To build the server daemons, and FUSE client,

$ ./autogen.sh
$ ./configure

$ make
 or
$ cd src
$ make

(Note that the FUSE client will only be built if libfuse is present.)

----

A quick summary of binaries that will be built in src/

daemons:
 cmon -- monitor daemon.  handles cluster state and configuration
         information.
 cosd -- storage daemon.  stores objects on a given block device.
 cmds -- metadata daemon.  handles file system namespace.
 ceph -- send management commands to the monitor cluster.

userland clients:
 cfuse -- fuse client.
 csyn -- synthetic workload generator client.

tools:
 monmaptool -- create/edit mon map
 osdmaptool -- create/edit osd map 
 crushtool -- create/edit crush map

scripts:
 mkcephfs -- cluster mkfs tool
 init-ceph -- init.d start/stop script