jpopfans1
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Posts posted by jpopfans1
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WeeboTech,
Would you mind give me details on how you setup the 2 N54L, hardware configuration and software configuration.
as a reference on maximizing the benefit of ESXi and unRaid on the little boxes.
BTW, if the startech card is only PCIe x1, it should have its own limitations in data transfer speed although the chipset can support 6gbps ...... PCIe x1 - maxi data transfer speed is cannot exceed 250MBs.
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Has anyone installed Esxi on MicroServer with Unraid virtual machine?
What Read speed are you getting if you copy large file from Samba to your windows disk? I am only getting 55MB/s read
I have installed unRAID 5.Xrc under ESX 5.1 on a microserver with 16GB of ram. I allocated 1GB to unRAID.
Using internal SATA, External SATA, ASmedia and SIL3134, SIL3132 cards I get 'raw' read rates from 95MB/s up to 180MB/s on the ASmedia 6GB/s SATA card. These are raw DD reads of the hard drive itself, bypassing any form of network or filesystem reads.
When writing to a drive without parity, the speeds varied anywhere from 90MB/s up to 195MB/s depending on how much data I was writing and whatever filesystem allocation there was. i.e. journaling absorbs some of the raw speed for writing.
I used port multipliers also and they were in the 100-120MB/s range for a single drive on the Silicon Image chipset and up to 190MB/s on the ASmedia SATA III card.
Tests were done using the Seagte 3TB 7200 RPM drive.
I used vmkfstools with the -z and -a pvscsi option to RDM the entire disk.
My tests without RDM proved to be quite slow and almost pointless to have resierfs on top of a virtual .vmdk container file on top of a VMFS data store. Even with fast RAID0 using 2 3TB drives, it was painfully slow and lengthy just to format.
1. Format the data store (fast).
2. Create the .vmdk (about hour and half).
3. Format the reiserfs filesystem (40 minutes or so).
RDM of the disk was almost as fast as native bare metal unraid. Very close in speed.
As far as transfer over the network. I did not test it. I knew if unRAID could read/write to the disk under ESX as fast, or nearly as fast, as bare metal, the rest would work at acceptable levels.
What network adapter did you choose?
E1000 or VMXNET?
What SCSI adapter did you use for the RDM disk (if you configured it that way).
I found the LSI SAS adapter to be fast, but it bottle necked at around 120 MB/s.
I immediately reconfigured with the PVSCSI adapter and the speed went up to 180MB/s.
as a test do this to see your raw hard drive read capability.
dd if=/dev/sd? of=/dev/null bs=4096 count=1024000
Where ? is the device's last character.
This will read 4GB raw from the hard drive. It will show you the maximum speed you could possibly get from the hard drive for sequential data on the outer tracks.
There are all sorts of file system references that occur, so file reads on a formatted file system will be slower.
you can do the same to write a file and read it if the hard drive is mounted
echo 3 > /proc/sys/vm/drop_caches # drop pagecache, dentries and inodes
dd if=/dev/zero of=/mnt/disk1/test.dd bs=4096 count=1024000
echo 3 > /proc/sys/vm/drop_caches # drop pagecache, dentries and inodes
dd if=/mnt/disk1/test.dd of=/dev/null bs=4096 count=1024000
Hi,
When u did these tests, is it
With modified bios,
Esxi
Unraid on top , with rdm
PCIe raid card, with esata ports connected to external enclosure
?
Btw, how do you use the 4 bay come with the box ?
MicroServer N36L/N40L/N54L - 6 Drive Edition
in Unraid Compulsive Design
Posted