[zfs-discuss] Re: ZFS compression / ARC interaction

2006-12-07 Thread Andrew Miller
Looking at the source code overview, it looks like the compression happens underneath the ARC layer, so by that I am assuming the uncompressed blocks are cached, but I wanted to ask to be sure. Thanks! -Andy Yup, your assumption is correct. We currently do compression below the

[zfs-discuss] Re: ZFS compression / ARC interaction

2006-12-07 Thread Andrew Miller
Be careful here. If you are using files that have no data in them yet you will get much better compression than later in life. Judging by the fact that you got only 12.5x, I suspect that your files are at least partially populated. Expect the compression to get worse over time. I do