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Increase default block size from 4K to 64K. It was reduces 6 yeard ago,

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when trees were big and FAST mode was enabled by default.

So small block size doesn't benefits linear I/O operations in FAST and
significantly slowdowns in ECONOMIC (default) mode. For single stream random
I/Os so small block doesn't give much benefits, as access time is usually
bigger then transfer time there. Same time it requires all heads to seek
together for every single request, reducing performance on parallel load.
This commit is contained in:
Alexander Motin 2010-01-06 17:12:18 +00:00
parent 8f70111670
commit 2cf8fb9be3
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=201658
1 changed files with 1 additions and 1 deletions
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sbin/geom/class/stripe/geom_stripe.c
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@ -46,7 +46,7 @@ __FBSDID("$FreeBSD$");
uint32_t lib_version = G_LIB_VERSION;
uint32_t version = G_STRIPE_VERSION;
static intmax_t default_stripesize = 4096;
static intmax_t default_stripesize = 65536;
static void stripe_main(struct gctl_req *req, unsigned flags);
static void stripe_clear(struct gctl_req *req);