[Moosefs-users] mfsmaster start very slow

[Cheng Y. <ch...@ih...>]

Hi,

I am using MFS 1.6.17, but when I start mfsmaster, it is very slow - about 10 minutes.
About 5 million files, totally 387GB are stored in MFS currenlty, the size of metadata.mfs is 622MB.
I use the default mfsmaster.cfg execept set BACK_LOGS = 2. 
The metadata is stored in a dedicated ext3 RAID1 with two 15k RPM SAS disks, and performance is good.
The memory of mfsmaster machine is 24GB, and two xeon E5506@2.13GHz  CPUs are installed. 
Can you help me? Thank you very much in advance. 

#time mfsmaster start
working directory: /data/mfsmeta
lockfile created and locked
initializing mfsmaster modules ...
loading sessions ... ok
sessions file has been loaded
exports file has been loaded
loading metadata ...
loading objects (files,directories,etc.) ... ok
loading names ... ok
loading deletion timestamps ... ok
checking filesystem consistency ... ok
loading chunks data ... ok
connecting files and chunks ... ok
all inodes: 6385024
directory inodes: 410854
file inodes: 5882087
chunks: 5702997
metadata file has been loaded
stats file has been loaded
master <-> metaloggers module: listen on *:9419
master <-> chunkservers module: listen on *:9420
main master server module: listen on *:9421
mfsmaster daemon initialized properly
real    10m35.844s
user    0m0.000s
sys     0m0.005s

# ls -l /data/mfsmeta
total 647904
-rw-r----- 1 mfs mfs      1174 Nov 22 11:41 changelog.1.mfs
-rw-r----- 1 mfs mfs      1840 Nov 22 11:25 changelog.2.mfs
-rw-r----- 1 mfs mfs 662172068 Nov 22 11:42 metadata.mfs
-rw-r----- 1 mfs mfs      1521 Nov 22 11:03 sessions.mfs
-rw-r----- 1 mfs mfs    610016 Nov 22 11:41 stats.mfs

# mfsdirinfo /mnt/mfs
/mnt/mfs:
 inodes:                    6382747
  directories:               410854
  files:                    5879810
 chunks:                    5701098
 length:               387902712498
 size:                 745191196672
 realsize:             745191196672


2010-11-22 
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