Re: How to partition directory structur for 300K files?

[Mathieu Chateau <mathieu.chateau@xxxxxxx>]

Re,

putting back mailing list so they keep up.

With newer version, fuse perform much better, and provide transparent failover. As both brick are 2 VM in same host, latency will not be an issue.

Most important is to ensure you have drivers /tools inside VM to get best perf.

on client and servers, I use this in /etc/sysctl.conf

vm.swappiness=0
net.core.rmem_max=67108864
net.core.wmem_max=67108864
# increase Linux autotuning TCP buffer limit to 32MB
net.ipv4.tcp_rmem="4096 87380 33554432"
net.ipv4.tcp_wmem="4096 65536 33554432"
# increase the length of the processor input queue
net.core.netdev_max_backlog=30000
# recommended default congestion control is htcp
net.ipv4.tcp_congestion_control=htcp

options I set on gluster volumes:

server.allow-insecure: on
performance.client-io-threads: on
performance.read-ahead: on
performance.readdir-ahead: enable
performance.cache-size: 1GB
performance.io-thread-count: 16

Options I set on brick in fstab for XFS mounted volumes used by gluster:

defaults,noatime,nodiratime,logbufs=8,logbsize=256k,largeio,inode64,swalloc,allocsize=131072k,nobarrier

Cordialement,
Mathieu CHATEAU
http://www.lotp.fr

2015-08-24 16:11 GMT+02:00 Merlin Morgenstern <merlin.morgenstern@xxxxxxxxx>:

re your questions:

> did you do some basic tuning to help anyway ?

no, this is a basica setup. Can you please direct me to the most important tuning parameters to look at?

> using latest version ?

glusterfs 3.7.3 built on Jul 28 2015 15:14:43

> in replication or only distributed ?

re 2

> Why using NFS and not native fuse client to mount volume?

I was reading that the NFS-Client is better with small files. (typical 2-20KB in my case)

> did you install VM tools (if using VMware fusion) ?

I am using virtualbox 5.0.3 on Mac OS X 10.10

2015-08-24 16:01 GMT+02:00 Mathieu Chateau <mathieu.chateau@xxxxxxx>:

Hello,

did you do some basic tuning to help anyway ?

using latest version ?

in replication or only distributed ?

Why using NFS and not native fuse client to mount volume?

did you install VM tools (if using VMware fusion) ?

Cordialement,
Mathieu CHATEAU
http://www.lotp.fr

2015-08-24 15:20 GMT+02:00 Merlin Morgenstern <merlin.morgenstern@xxxxxxxxx>:

I am running into trouble while syncing (rsync, cp ... ) my files to glusterfs. After about 50K files, one machine dies and has to be rebooted.

As there are about 300K files in one directory, I am thinking about to cluster that in a directory structure in order to overcome that problem.

e.g. /0001/filename /0002/filename

That would cut down the amount of files in one directory. However this is something I would like to avoid if possible due to SEO - changing the url of the file brings a lot of trouble.

The system underneith are 2 seperate VM instances, each running ubuntu 14.04. Cluster NFS client on same machine as Gluster server. Macbook Pro 13 retina with capable SSD and 1G internal network between the VMs.

Thank you for any help on this.

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