Thanks. :)
I have tested in my system, it's great.
But, you know, ZIO is pipelined, it means that the IO request may be sent, and
when you unlink the file, the IO stage is in progress.
so, would it be canceled else?
From: Bob Friesenhahn
To: Chookie
Hi All,
You know, ZFS afford a very Big buffer for write IO.
So, When we write a file, the first stage is put it to buffer.
But, if the file is VERY short-lived? Is it bring IO to disk?
or else, it just put the meta data and data to memory, and then removed it?
___
server memory? or
increase the clients?
From: David Pacheco
To: Chookiex
Cc: zfs-discuss@opensolaris.org
Sent: Friday, June 26, 2009 1:00:36 AM
Subject: Re: [zfs-discuss] Is the PROPERTY compression will increase the ZFS
I/O throughput?
Chookiex wrote:
>
no random read
test?
My data is text data set, about 320,000 text files or emails. The compression
ratio is:
lzjb 1.55x
gzip-1 2.54x
gzip-2 2.58x
gzip 2.72x
gzip-9 2.73x
for your curiosity :)
From: David Pacheco
To: Chookiex
Cc: zfs-discuss@opensolaris.org
read would be better
than write?
Is the ARC or L2ARC do any tricks?
Thanks
From: David Pacheco
To: Chookiex
Cc: zfs-discuss@opensolaris.org
Sent: Wednesday, June 24, 2009 4:53:37 AM
Subject: Re: [zfs-discuss] Is the PROPERTY compression will increase the ZFS
Hi all.
Because the property compression could decrease the file size, and the file IO
will be decreased also.
So, would it increase the ZFS I/O throughput with compression?
for example:
I turn on gzip-9，on a server with 2*4core Xeon, 8GB RAM.
It could compress my files with compressratio 2.5x+
Hi all,
I have 2 questions about ZFS.
1. I have create a snapshot in my pool1/data1, and zfs send/recv it to
pool2/data2. but I found the USED in zfs list is different:
NAME USED AVAIL REFER MOUNTPOINT
pool2/data2 160G 1.44T 159G /pool2/data2
pool1/data 176G 63
I make a file zpool like this:
bash-3.00# zpool status
pool: filepool
state: ONLINE
scrub: none requested
config:
NAME STATE READ WRITE CKSUM
filepool ONLINE 0 0 0
/export/f1.dat ONLINE 0 0 0
/export/f2.d
I make a file zpool like this:
bash-3.00# zpool status
pool: filepool
state: ONLINE
scrub: none requested
config:
NAME STATE READ WRITE CKSUM
filepool ONLINE 0 0 0
/export/f1.dat ONLINE 0 0 0
/export/f2.d
