From: "Martin K. Petersen" <martin.petersen@oracle.com>
To: Hannes Reinecke <hare@suse.de>
Cc: Christoph Hellwig <hch@infradead.org>,
device-mapper development <dm-devel@redhat.com>,
"linux-scsi@vger.kernel.org" <linux-scsi@vger.kernel.org>,
"Martin K. Petersen" <martin.petersen@oracle.com>
Subject: Re: [LSF/MM ATTEND] discuss blk-mq related to DM-multipath and status of XCOPY
Date: Thu, 08 Jan 2015 09:39:10 -0500 [thread overview]
Message-ID: <yq1vbkh2v75.fsf@sermon.lab.mkp.net> (raw)
In-Reply-To: <54AE2436.2000004@suse.de> (Hannes Reinecke's message of "Thu, 08 Jan 2015 07:31:18 +0100")
>>>>> "Hannes" == Hannes Reinecke <hare@suse.de> writes:
Hannes> But the array might prioritize 'normal' I/O requests, and treat
Hannes> XCOPY with a lower priority. So given enough load XCOPY might
Hannes> actually be slower than a normal copy ...
Yes, but may have lower impact on concurrent I/O.
--
Martin K. Petersen Oracle Linux Engineering
next prev parent reply other threads:[~2015-01-08 14:39 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-01-04 17:16 [LSF/MM ATTEND] discuss blk-mq related to DM-multipath and status of XCOPY Mike Snitzer
2015-01-05 13:25 ` [dm-devel] " Hannes Reinecke
2015-01-06 23:55 ` Martin K. Petersen
2015-01-07 8:32 ` Hannes Reinecke
2015-01-07 23:39 ` Martin K. Petersen
2015-01-08 6:31 ` Hannes Reinecke
2015-01-08 14:39 ` Martin K. Petersen [this message]
2015-01-06 23:52 ` Martin K. Petersen
2015-01-07 17:00 ` Nicholas A. Bellinger
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