Posts Tagged ‘Storage’

Single Initiator Zoning, recommended or not?

March 4th, 2010 15 Comments

A question we receive a lot is what kind of zoning should be implemented for our storage solution? The answer is usually really short and simple: at least single initiator zoning.
Single initiator zoning is something we have always recommend in the field (VMware PSO Consultants/Architects) and something that is clearly mentioned in our documentation… at [...]

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Posted in Various | Tags: best practice, ESX, esxi, san, Storage, vSphere

Re: Memory Compression

March 2nd, 2010 4 Comments

I was just reading Scott Drummonds article on Memory Compression. Scott explains where Memory Compression comes in to play. I guess the part I want to reply on is the following:
VMware’s long-term prioritization for managing the most aggressively over-committed memory looks like this:

Do not swap if possible.  We will continue to leverage transparent page sharing [...]

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Posted in PASS Syndication, Server | Tags: ESX, esxi, performance, Storage, vcdx, vcenter

Definition of the advanced NFS options

February 13th, 2010 No Comments

An often asked question when implementing NFS based storage is what do these advanced settings represent you are recommending me to change?
VMware published a great KB article which describes these. For instance:
NFS.HeartbeatMaxFailures
The number of consecutive heartbeat requests that must fail before the server is marked as unavailable.
The KB article does not only explain the separate NFS settings but [...]

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Posted in Server | Tags: ESX, esxi, netapp, nfs, Storage, vSphere, vstorage

Storage Masking?

February 5th, 2010 13 Comments

I received a bunch of questions around storage masking over the last couple of weeks. One of them was around VMware’s best practice to mask LUNs on a per cluster basis. The best practice has been around for years and basically is there to reduce conflicts. More hosts accessing the same LUNs means more overhead, [...]

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Posted in PASS Syndication, Server | Tags: design, ESX, Storage, storage vmotion

Real life RAID penalty example added to the IOps article

January 11th, 2010 6 Comments

I just added a real life RAID penalty example to the IOps article. I know Sys Admins are lazy,  so here’s the info I just added:
I have two IX4-200Ds at home which are capable of doing RAID-0, RAID-10 and RAID-5. As I was rebuilding my homelab I thought I would try to see what changing [...]

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Posted in Server | Tags: ESX, esxi, performance, Storage, vstorage

FC vs NFS vs iSCSI

January 7th, 2010 8 Comments

I was just reading the excellent whitepaper that NetApp just published. The paper is titled “VMware vSphere multiprotocol performance comparison using FC, iSCSI and NFS“. I guess the title says enough and I don’t need to explain why it is important to read this one.
I read the paper twice so far. Something that stood out [...]

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Posted in PASS Syndication, Server | Tags: netapp, overhead, performance, Storage

IOps?

December 23rd, 2009 50 Comments

Just something I wanted to document for myself as it is info I need on a regular basis and always have trouble finding it or at least finding the correct bits and pieces. I was more or less triggered by this excellent white paper that Herco van Brug wrote. I do want to invite everyone [...]

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Posted in PASS Syndication, Server | Tags: performance, Storage
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