search for: fs_mark

Hi Jeff, On 07/03/2010 03:58 AM, Jeff Moyer wrote: > Hi, > > Running iozone or fs_mark with fsync enabled, the performance of CFQ is > far worse than that of deadline for enterprise class storage when dealing > with file sizes of 8MB or less. I used the following command line as a > representative test case: > > fs_mark -S 1 -D 10000 -N 100000 -d /mnt/test/fs_mark...

Hi everyone, I''ve pushed out my current kernel git tree to a new branch called integration-test. This is meant for integration testing only and should not be run by anyone who doesn''t love crashes. I''ve pulled together a lot of important work from a lot of different people. It includes: The new inode number allocator Delayed inode and directory item updates Scrub,

...o the in memory btrfs inode that keeps track of the last transaction that modified the inode. So when we go to do a fsync on the inode if the commit was already done or the transaction was removed (meaning it had been committed and freed) we just exit out. So here are the numbers. This is running fs_mark with the following command fs_mark -d /mnt/btrfs-test/default/ -s 10240 -n 1000 run 10 times. First run is without any of the patches, with the exception of the put_transaction/trans_mutex fix. FSUse% Count Size Files/sec App Overhead 0 1000 10240...

Josef''s fs_mark test fs_mark -d /mnt/btrfs-test -D 512 -t 16 -n 4096 -F -S0 on a 2GB single metadata fs leaves about 400Mb of metadata almost unused. This patch reduces metadata chunk allocations by considering the proper metadata chunk size of 200MB in should_alloc_chunk(), not the default 256MB which is set...

Hello everyone, I've just pushed out some really experimental stuff, mostly so that Josef is working against my latest code. The new changes replace the extent tree preallocation code with something less complex, and try to make tree defrag and snapshot deletion more friendly in terms of dropping locks more frequently. Josef, this should increase the concurrency a little for your work.

Le 13/05/2020 ? 02:13, Orion Poplawski a ?crit?: > On 5/12/20 2:46 AM, Patrick B?gou wrote: >> Hi, >> >> I need some help with NFSv4 setup/tuning. I have a dedicated nfs server >> (2 x E5-2620? 8cores/16 threads each, 64GB RAM, 1x10Gb ethernet and 16x >> 8TB HDD) used by two servers and a small cluster (400 cores). All the >> servers are running CentOS 7, the

...e leaf, we must jump out the cached extent buffer search, and do the common search. - After the common search (use btrfs_search_slot), we will cache the leaf or the level-1 node into the btrfs i-node object. I have done small file performance (inline file) by sysbench and file creation test by fs_mark for the patch, and found it can make btrfs 5% ~ 16% faster. I think as the tree becomes deeper, the performance improvement of this patch will become bigger. Signed-off-by: Miao Xie <miaox@cn.fujitsu.com> --- fs/btrfs/btrfs_inode.h | 3 + fs/btrfs/ctree.c | 591 ++++++++++++++++++...

...inst the amount of free space in the space_info where the root you are modifying would allocate out of. If there is not enough free space, you will get an PTR_ERR(-ENOSPC) returned. Now the data ENOSPC checker does not check metadata space, it only checks data space, and this seems to speed up my fs_mark tests quite a bit. Everytime we start a new transaction, we calculate how much space we have for metadata and store it in the transaction, so we do not go above that number of bytes. Also, we calculate how many bytes would be needed to commit the transaction, and subtract that from the maximum nu...