Migrate large amount of small files

Mike Tancsa mike at sentex.net
Sun Oct 11 21:06:54 UTC 2009

At 11:46 AM 10/10/2009, Ckcheng wrote:
>Hi all,
>Currently, I have a directory with over 5M small files (1~32K). Now,
>I want to transfer this directory to another machine and found
>that it's extremely slow and painful process. I tried the following

It might help if you mount all -onoatime as well as bump up 
vfs.ufs.dirhash_maxmem to 4x the default size


>1. rsync
>2. tar via ssh
>3. tar via nc
>(all take hours and hours to finish)
>None of them is able to give me a reasonable migration time. So, I'm
>here for asking help. Any suggestion is extremely welcomed. Thank you.
>Btw, here is brief information of my server. (both machines are the same)
>OS: FreeBSD 6.4-Stable 64Bit
>CPU: 2 x Xeon L5420 2.50GHz
>RAM: 2 x 2G ECC DDR2-667 (full buffered)
>DISK: Seagate Barracuda ES 16MB (SATA 300)
>Network: 1Gbps (Broadcom BCM5708)
>Filesystem: UFS2
>freebsd-performance at freebsd.org mailing list
>To unsubscribe, send any mail to "freebsd-performance-unsubscribe at freebsd.org"

Mike Tancsa,                                      tel +1 519 651 3400
Sentex Communications,                            mike at sentex.net
Providing Internet since 1994                    www.sentex.net
Cambridge, Ontario Canada                         www.sentex.net/mike

More information about the freebsd-performance mailing list