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From: Vladislav Bolkhovitin <vst-d+Crzxg7Rs0@public.gmane.org>
To: FUJITA Tomonori
	<fujita.tomonori-Zyj7fXuS5i5L9jVzuh4AOg@public.gmane.org>
Cc: James.Bottomley-JuX6DAaQMKPCXq6kfMZ53/egYHeGw8Jk@public.gmane.org,
	stgt-devel-0fE9KPoRgkgATYTw5x5z8w@public.gmane.org,
	linux-scsi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	scst-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org
Subject: Re: Performance of SCST versus STGT
Date: Tue, 22 Jan 2008 14:33:13 +0300	[thread overview]
Message-ID: <4795D479.1080805@vlnb.net> (raw)
In-Reply-To: <20080122122657R.fujita.tomonori-Zyj7fXuS5i5L9jVzuh4AOg@public.gmane.org>

FUJITA Tomonori wrote:
> The big problem of stgt iSER is disk I/Os (move data between disk and
> page cache). We need a proper asynchronous I/O mechanism, however,
> Linux doesn't provide such and we use a workaround, which incurs large
> latency. I guess, we cannot solve this until syslets is merged into
> mainline.

Hmm, SCST also doesn't have ability to use asynchronous I/O, but that 
doesn't prevent it from showing good performance.

Vlad

  parent reply	other threads:[~2008-01-22 11:33 UTC|newest]

Thread overview: 37+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-01-17  9:27 Performance of SCST versus STGT Bart Van Assche
2008-01-17  9:40 ` FUJITA Tomonori
2008-01-17  9:48   ` Vladislav Bolkhovitin
2008-01-17 10:05     ` FUJITA Tomonori
2008-01-17 14:22       ` Erez Zilber
     [not found]         ` <478F64A0.6020201-hKgKHo2Ms0F+cjeuK/JdrQ@public.gmane.org>
2008-01-17 14:32           ` Vladislav Bolkhovitin
     [not found]             ` <478F6708.30604-d+Crzxg7Rs0@public.gmane.org>
2008-01-17 14:46               ` Erez Zilber
     [not found]       ` <20080117190558K.fujita.tomonori-Zyj7fXuS5i5L9jVzuh4AOg@public.gmane.org>
2008-01-17 10:34         ` Vladislav Bolkhovitin
     [not found]           ` <478F2F46.9040103-d+Crzxg7Rs0@public.gmane.org>
2008-01-17 12:29             ` Robin Humble
2008-01-17 13:44               ` [Scst-devel] [Stgt-devel] " Vladislav Bolkhovitin
     [not found]               ` <20080117122956.GA3567-Td5ZOp7sT3Xw02mFwxTg32+DJq1SqhBbsOSz5zK2v9k@public.gmane.org>
2008-01-17 14:43                 ` Bart Van Assche
2008-01-17 17:45         ` Pete Wyckoff
     [not found]           ` <20080117174542.GC29650-pxmRpbKlMIQ@public.gmane.org>
2008-01-18 10:30             ` Bart Van Assche
2008-01-18 12:08           ` Vladislav Bolkhovitin
2008-01-20  9:36             ` Bart Van Assche
     [not found]               ` <e2e108260801200136g7f17b8a0g89a54cc1d73bbc34-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2008-01-21 12:07                 ` Vladislav Bolkhovitin
2008-01-22  3:26                 ` FUJITA Tomonori
     [not found]                   ` <20080122122657R.fujita.tomonori-Zyj7fXuS5i5L9jVzuh4AOg@public.gmane.org>
2008-01-22  7:50                     ` Bart Van Assche
2008-01-22 11:33                     ` Vladislav Bolkhovitin [this message]
     [not found]                       ` <4795D479.1080805-d+Crzxg7Rs0@public.gmane.org>
2008-01-22 11:48                         ` FUJITA Tomonori
2008-01-22 12:20                           ` Vladislav Bolkhovitin
2008-01-22 15:14                     ` Bart Van Assche
2008-01-22 10:04           ` Bart Van Assche
2008-01-22 11:33             ` Vladislav Bolkhovitin
     [not found]               ` <4795D4A7.5000105-d+Crzxg7Rs0@public.gmane.org>
2008-01-22 12:32                 ` Bart Van Assche
     [not found]                   ` <e2e108260801220432l353b1d76xd2707b5e6f336aef-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2008-01-22 15:23                     ` Vladislav Bolkhovitin
2008-01-24  7:06                     ` Robin Humble
2008-01-24 10:36                       ` [Stgt-devel] " Bart Van Assche
2008-01-24 11:10                         ` Vladislav Bolkhovitin
     [not found]                           ` <4798720E.4020802-d+Crzxg7Rs0@public.gmane.org>
2008-01-24 11:40                             ` Robin Humble
     [not found]                               ` <20080124114027.GC26751-Td5ZOp7sT3Xw02mFwxTg32+DJq1SqhBbsOSz5zK2v9k@public.gmane.org>
2008-01-24 12:41                                 ` Vladislav Bolkhovitin
     [not found]                         ` <e2e108260801240236o2273be0bw24a2a61dcc781222-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2008-01-24 11:32                           ` Robin Humble
     [not found]                             ` <20080124113215.GB26751-Td5ZOp7sT3Xw02mFwxTg32+DJq1SqhBbsOSz5zK2v9k@public.gmane.org>
2008-01-24 12:40                               ` Vladislav Bolkhovitin
2008-01-24 16:16                       ` [Stgt-devel] " Bart Van Assche
2008-01-24 19:54                         ` Vladislav Bolkhovitin
2008-01-25  7:24                           ` Bart Van Assche
2008-01-22 12:33               ` Bart Van Assche

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