Seagate ST336704FC Guide d'installation télécharger pdf (Page 30)

Chapter 1: HP Clustered File System Commands 24

12... Per-target I/O statistics in tuples, or groups of two numbers. (The

number of targets is indicated in field 4.) Each tuple consists of the

following fields for each target:

• SCSI I/Os queued

• Transient failures

Note that the “SCSI I/Os queued” numbers are for the underlying

disk, not the partition. PSD devices that share the same underlying

disk will share the same numbers here.

12+$4*2... I/O statistics in quads, or groups of four numbers. (The number

of quads appears in field 6, “Number of I/O sizes”). Each quad consists of

the following fields for each I/O size:

• Minimum latency

•Maximum latency

• Count of I/Os

• Total latency for all I/Os

The minimum and maximum latency are reset every interval. Latencies

are in microseconds.

mxnlmconfig – enable or disable

Synopsis

/opt/hpcfs/mxnlmconfig -q|-e|-d

Description

NLM is the locking protocol used by NFS. By default, it is disabled in

CFS-Linux. If necessary, NLM can be enabled; however, you should be

aware of the following caveat:

• File locks granted by the NFS server are cluster-coherent. When a

failover occurs, the locks are released by the original server and the

client automatically reclaims them on the new server (the backup

node). However, during the period after the lock is released, another

client or application may compete for and win the lock.

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Seagate ST336704FC Guide d'installation Page 30