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iscsi network share + xfs

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Operating Systems Linux SuSE iscsi network share + xfs
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Old 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.Smilie

We need to use lock-aware fiesystem as OCFS, GFS or something.
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LEARN ABOUT FREEBSD

iscsi_initiator

ISCSI_INITIATOR(4)					   BSD Kernel Interfaces Manual 					ISCSI_INITIATOR(4)

NAME

     iscsi_initiator -- kernel driver for the iSCSI protocol

SYNOPSIS

     To compile this driver into the kernel, place the following lines in your kernel configuration file:

	   device iscsi_initiator

     Alternatively, to load the driver as a module at boot time, place the following line in loader.conf(5):

	   iscsi_initiator_load="YES"

DESCRIPTION

     This driver, along with its userspace counterpart iscontrol(8), is obsolete.  Users are advised to use iscsi(4) instead.

     The iscsi_initiator implements the kernel side of the Internet SCSI (iSCSI) network protocol standard, the user land companion is
     iscontrol(8), and permits access to remote virtual SCSI devices via cam(4).

SYSCTL VARIABLES

     debug.iscsi_initiator     set the debug-level, 0 means no debugging, 9 for maximum.

     net.iscsi.isid	       the initiator part of the Session Identifier.

     kern.cam.cam_srch_hi=1    allow search above LUN 7 for SCSI3 and greater devices.

     the following are informative only:

     net.iscsi.driver_version  the current version of the driver.

     net.iscsi.sessions        the number of current active sessions.

     net.iscsi.n.targetname    is the targe name of session n.

     net.iscsi.n.targeaddress  is the IP address of the target of session n.

     net.iscsi.n.stats	       are some statistics for session n

     net.iscsi.n.pid	       is the process id of the userland side of session n, see iscontrol(8).

FILES

     The iscsi_initiator driver creates the following:

     /dev/iscsi      used to create new sessions.
     /dev/iscsi%d    for each new session.

SEE ALSO

     cam(4), camcontrol(8), iscontrol(8)

STANDARDS

     iSCSI RFC 3720

AUTHORS

     This software was written by Daniel Braniss <danny@cs.huji.ac.il>

BUGS

     The lun discovery method is old-fashioned.

BSD
								  October 9, 2014							       BSD