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1 Rookie
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November 21st, 2013 06:00
VNXe 3150 spa/spb failover
Hi All,
Because this is my first emc vnxe experience I have some questions regarding spa and spb failover.
We have 3 esx servers running vm's on or new vnxe.
I have created 2 VM datastores running different vm's.
one iscsi server on SPA with 2 lans: (172.31.0.20 and 172.31.0.21)
other iscsi server on SPB with 2 lans: ( 172.31.0.22 and 172.31.0.23)
because we want to use exchange datastore and cifs for fileserver we needed extra I/O modules.
and we bought 4 x 1gb lan for each SP
Now to put a SP in maintenance mode I'm little scared, is the config good enough?
And second, when I use CIFS configured with shared folder server on SPA in different subnet like 172.30.0.x do I need the same on SPB for failover to work?
Hope someone can help me out.
Thank you!
N.K.
DELL-Leo
Community Manager
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9K Posts
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November 22nd, 2013 01:00
Hey,
Please refer to below information. It will help to you.
Storage resources are distributed between the two SPs; however, a storage resource is only assigned to one SP at a time. For example, a Shared Folder storage created on SPA will not be associated with SPB unless an SP failover occurs.
An SP fails over when it reboots, experiences a hardware or software failure, or a user places it in Service Mode. In this case, the storage resource is failed over to the peer SP. The surviving SP assumes ownership and begins servicing host I/O requests. Note that when one SP is servicing all I/O requests, performance between hosts and
the VNXe system can be degraded.
DELL-Leo
Community Manager
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9K Posts
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November 27th, 2013 00:00
Hey,
How is the issue now?
chrislogo
98 Posts
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November 27th, 2013 00:00
iSCSI Server on SPA and SPB are independent of each other and work in Active/Active Mode. You can use other the iSCSI Server from SPA and SPB to serve data and in your case for different VMFS datastores.
An iSCSI Server on SPB is not a standby for an iSCSI Server on SPA they are separate. If an SP fails the iSCSI Server on that SP will failover to the peer and the VMFS datastores. will not lose access.
SPA - iSCSI Server A
SPB - iSCIS Server B
SPA - Down
SPB - iSCSI Server A , iSCIS Server B
Nkc1
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November 27th, 2013 00:00
Thank You
Nkc1
1 Rookie
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November 27th, 2013 00:00
The EMC VNXe High Availability was very helpful thank you.
still need to do some reconfiguration to make it all work in HA.
Still have a question that was not completely clear.
may i use both iscsi servers on spa and spb for different VMFS datastores, or I should keep one only for HA?
Thnx again!
DELL-Leo
Community Manager
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9K Posts
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November 27th, 2013 00:00
Hey,
"may i use both iscsi servers on spa and spb for different VMFS datastores?"
Absolutely you can. chrislogo mentioned example is good.
Glad to see you have understood the issue clearly.