Scott Dowdle wrote:
1) ext4 works fine and unless you have more than 16TB of storage in a single partition, it isn't really a problem. No ext4 doesn't have checksums but you do need backups no matter what filesystem you run. Filesystems that offer redundancy and checksums do not alleviate the need for backups.
Ext4 actually supports a lot more than 16TB. By default, CentOS6 only includes the ext4 tools with 32-bit support and that is why it only supports 16TB. If you install the latest ext4 tools, it has 48-bit support and ext4 itself was actually designed with 64-bit support to support 1 EiB (1,048,576 TiB) so ext4 was designed to be much more scalable than it is. I don't know why, but they don't make full use of it.
ZFS on the other hand was designed with 128-bit support for filesystems to handle 256 ZiB ( 274,877,906,944 TiB ). I can't think of any situation where you'd need that much space but it is definitely designed to withstand time.
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