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Apr
29
awarded  Popular Question
Apr
15
comment during snapshot merging… are deleted transactions ignored?
It was explained to me the other way... basically reverting to snapshots involves no extra IO, but deleting a snapshot involves a bunch of writes as they merge the changes since the snapshot into the base VMDK.
Apr
7
revised vSphere Datastore for specific datatypes: NFS or iSCSI
removed an assumption I was making about how this would be like FC.
Apr
7
comment vSphere Datastore for specific datatypes: NFS or iSCSI
I thought it was like FC... I guess it's not.
Apr
7
answered vSphere Datastore for specific datatypes: NFS or iSCSI
Mar
12
comment Why is RAID 1+6 not a more common layout?
I've (briefly) configured something like a raid 6+1- a Netapp local syncmirror will create an identical copy of itself and multiplex reads across both plexes, while mirroring writes. It's mostly used for migrating Netapp V-Series to new backend LUNs, however if I wanted to double my reliability, I could do that with this.
Mar
9
comment Storage tiering and SLA models
It can be, especially with SSD making two workloads on the same hardware bottleneck at two completely different levels. You can get a blurry number by measuring latency under various types of loads. Alternatively, you can apply a number that's definitely way lower than the box is capable of spiking to but high enough for your clients. And when your phone rings, you'll be guaranteed it's because someone's hitting their QOS limit, not a box limit.
Mar
9
comment Storage tiering and SLA models
The benefit is that it prevents one app from making everyone else's latency higher. I would almost recommend capping all workload to maybe 75% what the box can do, just to ensure that spikes never hit anyone else.
Mar
7
comment Storage tiering and SLA models
QOS, at least on Netapp, works the other way. It limits performance, but doesn't guarantee it.
Mar
6
answered Storage tiering and SLA models
Mar
5
awarded  Popular Question
Feb
26
comment FC-Multipath: Which path_selector performs best?
The difference may not even be attributable to the multipath setup.
Feb
24
comment NetApp filer - lots of 'low water mark' CPs triggering on idle filer
Lucky you! What firmware level? I run those two as well...
Feb
16
awarded  storage-area-network
Feb
10
comment One SAN connecting to Hyper-V and VMware
Nope, not something I have experience with.
Feb
9
answered One SAN connecting to Hyper-V and VMware
Feb
9
answered IBM DS3400 - how replace a good disk
Feb
4
answered How do I configure a CIFS only NetApp filer for ssh public-private key access?
Jan
29
answered default NTFS permissions on NetApp CIFS share
Jan
23
answered Differences between HP and EMC SAN