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iscsi network share + xfs
Post 302493934 by neutrino on Friday 4th of February 2011 11:40:09 AM
02-04-2011
iscsi network share + xfs
Hello,
we got a MD3000i used as a network share between two servers (say A and B). The problem we are facing is that file/directories created by server A are not visible on server B (and viceversa). It's not a problem with permission (chmod 777 doesn't help).
The MD3000i was at first used ony with server A. We then added server B. All files/directories added "before B" were readable from both A and .
Here are some details:
MD3000i
Read cache: Enabled
Write cache: Enabled
Write cache without batteries: Disabled
Write cache with mirroring: Disabled
Flush write cache after (in seconds): 10.00
Dynamic cache read prefetch: Enabled
XFS filesystem.
On server A we have (from /etc/fstab)
/dev/disk/by-id/scsi-36a4badb000443c1c000003a04bf628a4-part1 /storage xfs noauto,nofail 0 0
Could be a problem with a combination of cache and xfs barriers?
---------- Post updated at 05:40 PM ---------- Previous update was at 02:28 PM ----------
Ok, solved.
filesystem xfs doesn't support clustering.
We need to use lock-aware fiesystem as OCFS, GFS or something.
we got a MD3000i used as a network share between two servers (say A and B). The problem we are facing is that file/directories created by server A are not visible on server B (and viceversa). It's not a problem with permission (chmod 777 doesn't help).
The MD3000i was at first used ony with server A. We then added server B. All files/directories added "before B" were readable from both A and .
Here are some details:
MD3000i
Read cache: Enabled
Write cache: Enabled
Write cache without batteries: Disabled
Write cache with mirroring: Disabled
Flush write cache after (in seconds): 10.00
Dynamic cache read prefetch: Enabled
XFS filesystem.
On server A we have (from /etc/fstab)
/dev/disk/by-id/scsi-36a4badb000443c1c000003a04bf628a4-part1 /storage xfs noauto,nofail 0 0
Could be a problem with a combination of cache and xfs barriers?
---------- Post updated at 05:40 PM ---------- Previous update was at 02:28 PM ----------
Ok, solved.
filesystem xfs doesn't support clustering.
We need to use lock-aware fiesystem as OCFS, GFS or something.
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LEARN ABOUT HPUX
define_cached_server
define cached server(1m) define cached server(1m) NAME
define cached server - Creates knowledge of a server in the local clerk's cache SYNOPSIS
cdscp define cached server name tower value ARGUMENTS
A simple name for the cached server. The protocol sequence and network address of the server node. The format is protocol-sequence:net- work-address. A protocol-sequence is a character string identifying the network protocols used to establish a relationship between a client and server. There are two choices of protocol sequence, depending on the network address that is supplied in the binding: ncacn_ip_tcp or ncadg_ip_udp. For the network-address, specify an Internet address using the common Internet address notation. For more information about this format, see the RPC introduction in the DCE Application Development Reference. DESCRIPTION
The define cached server command creates knowledge of a server in the local clerk's cache. This command is typically used to manually pro- vide configuration information to a clerk that cannot automatically configure itself. This is required, for instance, to give the clerk addressing information about a server across a WAN. Once the clerk knows about one server, it can find other servers through referrals. Privilege Required You must have write permission to the clerk. NOTE
This command is replaced at Revision 1.1 by the dcecp command and may not be provided in future releases of DCE. EXAMPLES
The following command creates knowledge of the server nrl in the local clerk's cache: cdscp> define cached server nrl tower ncacn_ip_tcp:16.20.15.25 RELATED INFORMATION
Commands: clear cached server(1m), dump clerk cache(1m), show cached server(1m) Books: OSF DCE Application Development Reference define cached server(1m)