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vSphere High Performance Essentials by Christian Stankowic

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Common filesystems tweaks

With virtualization coming in the picture, it is also essential to consider the filesystem configuration in order to achieve the best performance. In the the previous chapter, you already learned about the I/O alignment and block sizes that match our physical infrastructure boundaries. To summarize it again, refer to the following table for useful block sizes:

Property/Filesystem

NTFS

Ext4

btrfs

ZFS

Operating system

Microsoft Windows

Linux

Solaris, BSD, and Linux

Block sizes

512, 1024, 2048, 4096, or 8192 bytes

16, 32, or 64 kBytes

1, 2, 4, or 64 kB

16, 32, or 64 kB

8 kB-128 kB in 1 kB steps

Recommendation

<16 TB volume size: 4 kB

16-32 TB size: 8 kB

32-64 TB: 16 kB

64-128 TB: 32 kB

128-256 TB: 64 ...

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