Question

Fibre Channel Throughput to a ramdisk

Asked by: jonke

Hi,

I have a Solaris machine with a Ramdisk attached - presented as a single lun through a single 1Gb Fibre Channel connection.

Currently I am benchmarking with this configuration.

I have tried 'dd' and 'mkfile' writing to both raw and filesystem. The biggest throughput I can seem to get with this configuration is about 95Mb/s to the ramdisk.

I am trying to work out where the bottle neck is - with the fibre channel, or the ramdisk.

What would I expect the theoretical upper limit of throughput to be if the ramdisk is not the bottleneck (i.e. it is the bandwisth of the fibrechannel).

I have also posted this in the Solaris section.

Cheers
Jonke

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Asked On
2003-09-23 at 09:59:42ID20746573
Tags

throughput

,

channel

,

fibre

,

ramdisk

Topics

Hard Drives & Storage

,

Tivoli Storage Manager

Participating Experts
3
Points
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Comments
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by: chicagoanPosted on 2003-09-23 at 10:57:30ID: 9415001

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by: durindilPosted on 2003-09-24 at 10:01:01ID: 9422327

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by: chicagoanPosted on 2003-09-24 at 10:10:18ID: 9422399

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by: durindilPosted on 2003-09-25 at 13:14:22ID: 9431328

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by: weitzeraPosted on 2003-09-25 at 22:02:15ID: 9433527

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by: chicagoanPosted on 2003-09-26 at 00:11:40ID: 9434167

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by: weitzeraPosted on 2003-09-26 at 11:01:55ID: 9438308

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by: weitzeraPosted on 2003-09-30 at 19:36:23ID: 9463392

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by: weitzeraPosted on 2003-10-01 at 12:58:00ID: 9469334

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by: chicagoanPosted on 2003-10-26 at 05:34:15ID: 9622367

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