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Gasoid2010-11-11 02:10:08
SAS
Gasoid, 2010-11-11 02:10:08

Connecting to the Network Server with Disk Array?

If there is a server with a disk array (FibreChannel 4Gb / s), then what kind of network connection is needed for it to issue these 4Gb?
Or will it not give out 4Gb / s to the network?

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4 answer(s)
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pentarh, 2010-11-11
@Gasoid

Depends on the type of load and disks used. On a random read, there may be cases when it will not give out even 300 Mbps with completely clogged IOPS.
Secondly, 4 Gb is the FC bandwidth to the receiving host. What the host does with disks and what it sends to the network are very different things, because there are a lot of intermediate buffers.
In general, you have a theoretical limit on the bandwidth of an FC link, and you are asking about the bandwidth of an Ethernet link that will be connected through an intermediate server. Too many uncertainties between them. Test.

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Sergey, 2010-11-11
@bondbig

iSCSI over 10G Ethernet optical link?
And are you sure that the array itself will be able to work at 4G speeds? What's an array?

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Gasoid, 2010-11-11
@Gasoid

FibreChannel 4Gbit / s, the network will issue the server itself.

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dsn, 2010-11-11
@dsn

Refine your question. Who and where should issue 4Gbit?
There are many factors here, array type, cache size, raid type, number of HBAs... And they don't measure the performance of disk operations in gigabits (Mb/s and IOPS).

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