Langzaam schrijven naar XRAID via AFP/SMB/NFS

[overloaddesign]

Ik Heb een raar probleem met een van onze XServe Raid systemen, de rest is engels ivm ctrl-c, ctrl-v van post op apple forum.


The system is connected in the following way:

 
Client--\        Ethernet         FC /-- Tape     /XRAID1
Client---Switch------------XServe------- SanBox----XRAID2
Client--/                                         \Promise RAID

When writing to XRAID 1 from one of the clients transfer speeds are really slow (1mb/ sec max).
The strange thing here is that activity monitor shows over 3300 iops /s on the drive of which most are RDMeta according to fs_usage.
A continuous reed of about 13 MB/s is seen on the drive. This happens on both partitions on the xraid1, each having their own fibre channel controller.
When writing to XRAID 2 or PRAID, all write speeds are >40MB/s, and no read activity can be seen in the monitor.

Here comes the strange part, when writing from xserve to xraid 1 directly transfer speeds are high >40MB/s,, and almost no read operation occours.

Here is what i already did :
- Checked Cache settings (both XRAID's have the same settings)
- Checked the cabeling (switched between xraid 1 and 2)
- Disabled spotlight search completely on all drives
- Tried to copy on a windows client
- Tried to copy with afp/smb/cifs
- Checked free room (800gb free of 2.5 tb)

[hans_lenze]

Heb je ook een vraag?

[ankhie]

Op basis van de topictitel en

When writing to XRAID 1 from one of the clients transfer speeds are really slow (1mb/ sec max).

lijkt me in elk geval wel duidelijk waar hij het antwoord op wil, gezien mijn upstream bij UPC nog sneller is dan dat ... kan alleen zelf niet helpen helaas ...

[hans_lenze]

Wat gebeurt er als je de share verwijdert en opnieuw aanmaakt? (bron: http://serverfault.com/qu...-usage-which-is-listed-by)

Wat is de status van je cache batterij? Staat de array in write-back of write-through modus?

[ Voor 20% gewijzigd door hans_lenze op 13-08-2014 20:30 ]