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тАО01-29-2011 11:43 AM
тАО01-29-2011 11:43 AM
Would Multi-Site config be slower than single site?
This might be a stupid question but it feels like since we reconfigured our storage nodes into a multi-site SAN, performance has decreased. Both sites are on the same LAN but will be in different rooms. Connection between rooms is 4 (1Gb) links.
Our setup consists of two SANs in the same management group. SAN-01 is two P4500-G2 (12 disks per node); SAN-2 is four P4500-G1 (12 Disks per node).
Room 1: P4500-G2-node1, P4500-G1-node(1&3)
Room 2: P4500-G2-node2, P4500-G1-node(2&4)
Our LUNS are configured for Network Raid-10; the Storage nodes are RAID-5
So is a multi-site SAN slower than a single site?
-Jay
Our setup consists of two SANs in the same management group. SAN-01 is two P4500-G2 (12 disks per node); SAN-2 is four P4500-G1 (12 Disks per node).
Room 1: P4500-G2-node1, P4500-G1-node(1&3)
Room 2: P4500-G2-node2, P4500-G1-node(2&4)
Our LUNS are configured for Network Raid-10; the Storage nodes are RAID-5
So is a multi-site SAN slower than a single site?
-Jay
3 REPLIES 3
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тАО01-30-2011 11:18 AM
тАО01-30-2011 11:18 AM
Re: Would Multi-Site config be slower than single site?
Jay,
Did you perform any iometer, or collect SNMP performance data before you migrated to multi-site?
I would not expect any slower performance, since Multi-Site is more of a logical configuration than anything else.
Were you performing Network RAID 10 (2-way replication) before you implemented the Multi-Site?
Did you perform any iometer, or collect SNMP performance data before you migrated to multi-site?
I would not expect any slower performance, since Multi-Site is more of a logical configuration than anything else.
Were you performing Network RAID 10 (2-way replication) before you implemented the Multi-Site?
http://www.tdonline.com
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тАО01-30-2011 05:45 PM
тАО01-30-2011 05:45 PM
Re: Would Multi-Site config be slower than single site?
I wish I had run some tests before the change, I didn't expect a change in performance. I'm not 100% sure the reconfig to multi-site caused this slow dow (we did upgrade to 8.1 to 8.5 and upgraded ESXi 4 to 4.1).
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тАО01-30-2011 08:13 PM
тАО01-30-2011 08:13 PM
Re: Would Multi-Site config be slower than single site?
If the latency between the sites is above 2ms(it might be 5ms), you will start to get slower operation if using synchronous replication.
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