Re: [zfs-discuss] Very strange performance patterns

2006-12-27 Thread Peter Schuller
> Short version: Pool A is fast, pool B is slow. Writing to pool A is > fast. Writing to pool B is slow. Writing to pool B WHILE writing to > pool A is fast on both pools. Explanation? [snip] For the archives, it is interesting to note that when I do not perform a local "dd" to the device, but i

[zfs-discuss] Very strange performance patterns

2006-12-20 Thread Peter Schuller
Hello, Short version: Pool A is fast, pool B is slow. Writing to pool A is fast. Writing to pool B is slow. Writing to pool B WHILE writing to pool A is fast on both pools. Explanation? Long version: I have an existing two-disk pool consisting of two SATA drives. Call this pool "pool1". This has