Re: [zfs-discuss] ZFS caching of compressed data

2010-03-28 Thread Andrey Kuzmin
There had been a discussion of the topic on this list bout a onth ago, and I'd been told that similar ideas (compressed metadata/data in ARC/L2ARC) is on zfs dev agenda. Regards, Andrey On Sun, Mar 28, 2010 at 2:42 AM, Stuart Anderson ander...@ligo.caltech.edu wrote: On Oct 2, 2009, at

Re: [zfs-discuss] ZFS caching of compressed data

2010-03-27 Thread Stuart Anderson
On Oct 2, 2009, at 11:54 AM, Robert Milkowski wrote: Stuart Anderson wrote: On Oct 2, 2009, at 5:05 AM, Robert Milkowski wrote: Stuart Anderson wrote: I am wondering if the following idea makes any sense as a way to get ZFS to cache compressed data in DRAM? In particular, given a

Re: [zfs-discuss] ZFS caching of compressed data

2009-10-02 Thread Robert Milkowski
Stuart Anderson wrote: I am wondering if the following idea makes any sense as a way to get ZFS to cache compressed data in DRAM? In particular, given a 2-way zvol mirror of highly compressible data on persistent storage devices, what would go wrong if I dynamically added a ramdisk as a 3rd

Re: [zfs-discuss] ZFS caching of compressed data

2009-10-02 Thread Stuart Anderson
On Oct 2, 2009, at 5:05 AM, Robert Milkowski wrote: Stuart Anderson wrote: I am wondering if the following idea makes any sense as a way to get ZFS to cache compressed data in DRAM? In particular, given a 2-way zvol mirror of highly compressible data on persistent storage devices, what

Re: [zfs-discuss] ZFS caching of compressed data

2009-10-02 Thread Robert Milkowski
Stuart Anderson wrote: On Oct 2, 2009, at 5:05 AM, Robert Milkowski wrote: Stuart Anderson wrote: I am wondering if the following idea makes any sense as a way to get ZFS to cache compressed data in DRAM? In particular, given a 2-way zvol mirror of highly compressible data on persistent

[zfs-discuss] ZFS caching of compressed data

2009-10-01 Thread Stuart Anderson
I am wondering if the following idea makes any sense as a way to get ZFS to cache compressed data in DRAM? In particular, given a 2-way zvol mirror of highly compressible data on persistent storage devices, what would go wrong if I dynamically added a ramdisk as a 3rd mirror device at boot