This post is not specific to ESXi, however, ESXi users typically experience more trouble with this topic due to the way VMware works.
When an application on a client machine wishes to write something to storage, it issues a write request. On a machine with local storage, this involves talking to the hard drive HBA and issuing a command to write a given block to a given spot on the disk. This much should be obvious. However, we are writing to a filesystem. The filesystem contains...
Sync writes, or: Why is my ESXi NFS so slow, and why is iSCSI faster?
When an application on a client machine wishes to write something to storage, it issues a write request. On a machine with local storage, this involves talking to the hard drive HBA and issuing a command to write a given block to a given spot on the disk. This much should be obvious. However, we are writing to a filesystem. The filesystem contains...
Sync writes, or: Why is my ESXi NFS so slow, and why is iSCSI faster?