So I am running a cache disk which isn't very full and has plenty of room.  I saw the drive filling up as I was doing a major copy.  Anyway as I am writing I see performance go in to the toilet from the read perspective.  I am streaming movies from another disk and they are choppy.  As soon as I killed the copy  read performance was back to normal.  I can only imagine since we are talking about different disks it is a controller issue... I attached my syslog.  The machine is pretty beefy with dual xeon procs and plenty of memory.  Let me know your thoughts...

 

Thanks!

 

Neil

syslog-2011-11-03.txt.zip

What are the system specs? What type of SATA boards?

It is a supermicro card. I bought in on thos C933 Supermicro servers that were discussed in "Good Deals"  The card is a: AOC-SAT2-MV8

 

Thanks,

 

Neil

 

If the cache drive get full beyond the min free space setting the next file gets written directly to the array. As an aside, do you have hyper-threading turned on?

I don't know but I think hyperthreading is enabled. 

 

The drive wasn't close to being full! It was like 1.3 TB out of 2 TB?

 

Neil

 

Turn hyper-threading on in BIOS. It can't hurt. What network connection speeds are you getting at the clients and server? Enter

ethtool eth0

on the server.

Something can't be right on my system.  I am deleting some files (albeit big ones) from the same folder as a movie I am streaming to SageTV.  At this very moment the video has locked up and will not play.  As a matter of fact it has caused SageTV to essentially crap the bed.  Not really sure what is going on but if I perform any file modifications (copying, deleting, or even writing to the cache drive) while streaming the stream just goes bad.

 

I don't believe this is a CPU problem given the fact that there are like dual dual core XEON's in there.

 

Thanks,

 

Neil

 

Something can't be right on my system.  I am deleting some files (albeit big ones) from the same folder as a movie I am streaming to SageTV.  At this very moment the video has locked up and will not play.  As a matter of fact it has caused SageTV to essentially crap the bed.  Not really sure what is going on but if I perform any file modifications (copying, deleting, or even writing to the cache drive) while streaming the stream just goes bad.

 

I don't believe this is a CPU problem given the fact that there are like dual dual core XEON's in there.

 

Thanks,

 

Neil

 

run top from the command line while you are doing the above.  Google how to understand the top results, but you will want to look at the system load and the I/O wait that it is reporting.

That sounds good but this server is a dedicated unraid server.  It runs nothing else so it is very strange.