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Thread: Bad Read Performace only 31MB/s !

  1. #1

    Default Bad Read Performace only 31MB/s !

    Hi,

    i use a ACER H340 Homeserver, with ATOM 230
    .
    I have added one a WD 1TB Disk and a System Disk of 120GB (2GB FAT32) for DSS v6 Lite.

    I use some benchmarking tools from Heise (ct´ ; benchmarks for USB Sticks).
    I created a 5GB Testfile, the software will first create the file and then reads it.

    It gives me a write performance of 57MB/s and a read performance of 31MB/sec.

    Write 57 from PC to NAS
    Read 31 from NAS to PC.

    System:
    Intel OEM Board
    Atom 230
    2GB Memory
    Marvel GBit NIC
    WD Green 1TB
    Seagte 120GB for System
    64 Bit OS!

    3COM Officeconnect GBit Switch - 5 Port

    Has anyone confirmed bad READ performance?

    Thanks

    Jürgen
    Server: Acer H340

  2. #2

    Default

    What type of drive is it (model #, interface type etc)

    Please Note:
    Writing to a single disk will result in slower speeds than writing to RAID array

    try testing with raid array

  3. #3

    Default

    Hi,

    writing is not the problem. The system write with 55-60MB/sec.

    The Problem ist reading, here the system is slow at all!

    I know that writing could be slow with a software raid or a bad disk.

    But reading is slow with cifs!
    Server: Acer H340

  4. #4

    Default Solved: Bad Read Performance

    After a change in the test scenario the read performance seems to fine.

    With totalcommander it could test a read performance of 55MByte/sec and a write performance of 57MByte/s in a RAID0 with one disc!!
    Server: Acer H340

  5. #5

    Default

    Quote Originally Posted by juergenb52
    After a change in the test scenario the read performance seems to fine.

    With totalcommander it could test a read performance of 55MByte/sec and a write performance of 57MByte/s in a RAID0 with one disc!!
    Hi,

    I've also found writes faster than reads, in our case using block mode iSCSI. Not completely got to bottom of it yet. Had a similar issue with OpenFiler, although with DSS the gap seems slightly smaller. This is on a HP DL380G5 with P400 SmartArray 256MB BBWC and 8x SAS disk in RAID6. Get around 60-90MB/sec write and 30-40MB/sec read.

    Just wondered if you could elaborate on the scenario issue? Do you mean you tweaked how you were measuring performance and got a faster speed or did you make some changes to DSS config? I'm also not clear on the significance of RAID0 with one(?) disk.

    Thanks for any feedback, Andrew

  6. Default

    Quote Originally Posted by symm
    What type of drive is it (model #, interface type etc)

    Please Note:
    Writing to a single disk will result in slower speeds than writing to RAID array

    try testing with raid array
    Hi..

    yes, maybe.. I have also tried that one.

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