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SageTV Linux Discussion related to the SageTV Media Center for Linux. Questions, issues, problems, suggestions, etc. relating to the SageTV Linux should be posted here.

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  #1  
Old 01-04-2006, 07:31 PM
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2gb clusters?!

As I recall, linux can do 2gb clusters. Is this true? Worth it? Seems like this would kill any fragmentation issues!

I.
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Client 1/Master BR - MediaMVP running a 30" Olevia LCD TV.
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  #2  
Old 01-04-2006, 07:39 PM
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If you use clusters that big, I'm going to bet you'll waste a ton of space...
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  #3  
Old 01-04-2006, 08:06 PM
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clusters what do mean storage nodes or serial and parallel processing
Now that swap partition limit may still be 2GB

Last edited by SHS; 01-04-2006 at 08:08 PM.
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  #4  
Old 01-04-2006, 08:14 PM
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If the cluster size doesn't affect the storage nodes, how's it going ot help with fragmentation? On a windows PC, cluster size directly relates to the smallest size a file can use on disk. A 1k file on a 64k cluster-sized drive takes 64k. While I'm assuming that Linux functions the same (never payed much attention, and I always accepted the default values for all that in Linux).
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  #5  
Old 01-04-2006, 08:20 PM
dagar dagar is offline
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2gb partition? lol, that's the partition limitation for FAT16

that said, ext2 has a partition size limit of 2TB but a file size limitation of 2GB

XFS and JFS can handle the larger files (+4GB files) ... steer clear of ReiserFS3/4
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  #6  
Old 01-04-2006, 08:28 PM
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Quote:
Originally Posted by dagar
2gb partition? lol, that's the partition limitation for FAT16

that said, ext2 has a partition size limit of 2TB but a file size limitation of 2GB

XFS and JFS can handle the larger files (+4GB files) ... steer clear of ReiserFS3/4
Actually we're talking about 2g cluster size.

You take a performance hit with the Reiser FS's don't you?
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  #7  
Old 01-04-2006, 08:47 PM
mikesm mikesm is offline
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Quote:
Originally Posted by dagar
2gb partition? lol, that's the partition limitation for FAT16

that said, ext2 has a partition size limit of 2TB but a file size limitation of 2GB

XFS and JFS can handle the larger files (+4GB files) ... steer clear of ReiserFS3/4
I use XFS on my TB raid server. Very high performance journaling filesystem that's built for heavy duty I/O. It uses DRAM like mad for buffering to improve performance - exactly what you want in a file server.

Linux has lots of advantages for storage over windows. That said, I strongly hold to the view that large amounts of storage should be in a different computer than the HTPC. HTPC's tend to have issues with noise and ventilation, and adding a lot of disk to that doesn't do the system or the disk any favors.

I can testify that you can achieve high levels of performance serving from Linux to windows over GB ethernet.

Thanks,
Mike
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  #8  
Old 01-04-2006, 10:03 PM
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so anyways...

2gb clusters is just food for thought. I suspect that it would only be useful if you have your recording settings at 2gb/hr. So in my case, I record at 3.2gb/hr, so it may be more beneficial to have .65gb (or so) clusters.

Doesnt seem like waste to me. Plus, I would assume that it will be helpful to reduce seek time and generally better on a HD.

I.

EDIT: meant .65gb
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My sage rigs:
Server - Windows 2003, Intel 865 PERLL w/ P4 3.2g 1gb ram, 3-PVR250, 3-PVRUSB's, 1 Skystar2, 1 twinhan 102g, 1 starbox DVB-S Cards. Evo network QAM encoder. 1.2TB storage 6.x server + MTSAGE for DVB
Client 1/Master BR - MediaMVP running a 30" Olevia LCD TV.
Client 2/Front Room - Shuttle ST61G4 XPC 1gig ram, 60gb HD, BTC9019 wireless keyboard/mouse & Harmony 880. 6.x client. GF6600GT driving a Sony WEGA 55" rear projection tv.

Last edited by insomniac; 01-04-2006 at 10:09 PM.
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  #9  
Old 01-04-2006, 10:06 PM
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I was going to suggest something along the 64m range myself, or at worst whatever size you're recording settings are / 2, so a half-hour show would fit into one cluster (you'd better pad the numbers just a bit tho, or you'll waste a ton of space if your show goes over by a couple minutes/megs...)

I just hope they offer a upgrade for us so we can convert an existing SageTV key to a Linux Key...
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  #10  
Old 01-04-2006, 10:10 PM
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just having anything over kb will be a great option in my book!

Quote:
Originally Posted by heffe2001
I was going to suggest something along the 64m range myself, or at worst whatever size you're recording settings are / 2, so a half-hour show would fit into one cluster (you'd better pad the numbers just a bit tho, or you'll waste a ton of space if your show goes over by a couple minutes/megs...)

I just hope they offer a upgrade for us so we can convert an existing SageTV key to a Linux Key...
__________________
If you're not cheating, your not trying...

My sage rigs:
Server - Windows 2003, Intel 865 PERLL w/ P4 3.2g 1gb ram, 3-PVR250, 3-PVRUSB's, 1 Skystar2, 1 twinhan 102g, 1 starbox DVB-S Cards. Evo network QAM encoder. 1.2TB storage 6.x server + MTSAGE for DVB
Client 1/Master BR - MediaMVP running a 30" Olevia LCD TV.
Client 2/Front Room - Shuttle ST61G4 XPC 1gig ram, 60gb HD, BTC9019 wireless keyboard/mouse & Harmony 880. 6.x client. GF6600GT driving a Sony WEGA 55" rear projection tv.
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  #11  
Old 01-10-2006, 08:49 PM
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Quote:
Originally Posted by mikesm
I use XFS on my TB raid server. Very high performance journaling filesystem that's built for heavy duty I/O. It uses DRAM like mad for buffering to improve performance - exactly what you want in a file server.
Mike,
If you don't mind, could you please post the specs of your raid server.
Mainly: OS, raid level, CPU, amount of ram....
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  #12  
Old 01-10-2006, 10:56 PM
mikesm mikesm is offline
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Quote:
Originally Posted by spike5884
Mike,
If you don't mind, could you please post the specs of your raid server.
Mainly: OS, raid level, CPU, amount of ram....
I run Suse 10.0 linux - SAMBA builtin
AMD 3500+ 939 CPU
DFI NF4-Ultra MB (Has 4 SATA II ports on board)
5x WD 320GB SATA disks
1 GB RAM
PCI video card
SIIG PCI SATA controller (for the 5th disk)
Coolermaster Stacker case

Runs very well.

Thanks,
Mike
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