Posts Tagged ‘misalignment’
Under the Covers with Miss Alignment Part 2: Linked Clones
September 22nd, 2011 | 
Author: This post is the continuation of Under the Covers with Miss Alignment: I keep hearing this rumor more and more often: It appears that both snapshots and linked clones on vSphere 4.x and 5.0 are misaligned. Not having had the time to actually put this to the test, I thought it would at least be informative to give you some more down-and-dirty information on the subject.
Posted in Storage, VDI and VMware View, VMware | 
Tags: alignment, data alignment, details, devil, linked clones, mis-alignment, misaligned, misalignment, Miss Alignment, snapshot, VMware, VMware View | 
1 Comment »
Under the covers with Miss Alignment: Full-stripe writes
In a previous blogpost I covered the general issue of misalignment on a disk segment level. This is the most occurring and the most obvious misalignment, where several spindles in a RAID set perform random I/O and misalignment causes more spindles need to seek for a single I/O than would be required when properly aligned.
Next in the series there is another misalignment issue which is rare, but can have a much bigger impact on tuned storage: Full stripe misalignment.
Posted in Storage, VMware |
Tags: full stripe, mis-alignment, misalignment, RAID10, RAID3, RAID5, write-optimized, writes |
4 Comments »
The Elusive Miss Alignment
Is it a new miss election?? Well, after doing more than a little testing I figured out I may be MISSing something… So unfortunately it is not about beautiful women, but yet another technical deepdive. This time into misalignment. Theoretically it is SO easy to point out what the problem is (see Throughput part 3: Data alignment. For this new blog entry I had my mind set on showing the differences between misalignment and alignment in the lab… However this proves to be much MUCH harder than anticipated…
Posted in Storage, VMware |
Tags: alignment, Elusive miss alignment, misalignment, miss, Miss Alignment, raid 0, RAID 5, raid0, RAID5, segment size, stripe size, VMware, vSphere |
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