How well would something like this work for storing the Syzygy WDL files?
https://www.visiontek.com/solid-state-d ... etail.html
Other suggestions welcome. I'm looking for a Linux-friendly, external USB 3 option, preferably bus-powered. Thanks.
USB 3 Storage for Syzygy WDL files
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zullil
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- Full name: Louis Zulli
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jpqy
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Re: USB 3 Storage for Syzygy WDL files
If these read & write speeds are real..well then you have a good one.
Just compare them with real benches..search in youtube!
JP.
Just compare them with real benches..search in youtube!
JP.
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jpqy
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yanquis1972
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Re: USB 3 Storage for Syzygy WDL files
thanks for sharing this link louis, havent heard of these. may pick one up myself & swap the wdl for a game or two when not chessing 
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Zenmastur
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Re: USB 3 Storage for Syzygy WDL files
This has the same performance with a lower price.zullil wrote:How well would something like this work for storing the Syzygy WDL files?
https://www.visiontek.com/solid-state-d ... etail.html
Other suggestions welcome. I'm looking for a Linux-friendly, external USB 3 option, preferably bus-powered. Thanks.
http://www.newegg.com/Product/Product.a ... -_-Product
It's also available in sizes of 60GB and 240GB.
Regards,
Forrest
Only 2 defining forces have ever offered to die for you.....Jesus Christ and the American Soldier. One died for your soul, the other for your freedom.
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jpqy
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Re: USB 3 Storage for Syzygy WDL files
Check on youtube..for sure not so good this Mushkin Enhanced Ventura Ultra 120GB!
https://www.youtube.com/watch?v=MIGDkpQwYpc
You need to check real life benches!
JP.
https://www.youtube.com/watch?v=MIGDkpQwYpc
You need to check real life benches!
JP.
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yurikvelo
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Re: USB 3 Storage for Syzygy WDL files
These are sequential read/write speed.
For Syzygy it's meaningfull. Latency (access time), I/O per second only matters.
Compare to ATA interface (DMA), USB is CPU-intensive protocol, so expect more nps dropdown.
Compare random vs sequential dropdown for Intel AHCI SATA vs USB 3.0 interfaces:
Intel RST SATA AHCI Drivers
Samsung 840 SSD 250GB
========================
Sequential Read : 514.179 MB/s
Sequential Write : 260.255 MB/s
Random Read 4KB (QD=1) : 24.252 MB/s [ 5921.0 IOPS]
Random Write 4KB (QD=1) : 45.642 MB/s [ 11143.1 IOPS]
Random Read 4KB (QD=32) : 254.315 MB/s [ 62088.6 IOPS]
Random Write 4KB (QD=32) : 179.794 MB/s [ 43895.1 IOPS]
Seagate USB 3.0 HDD
========================
Sequential Read : 61.168 MB/s
Sequential Write : 55.296 MB/s
Random Read 4KB (QD=1) : 0.362 MB/s [ 88.4 IOPS]
Random Write 4KB (QD=1) : 0.953 MB/s [ 232.6 IOPS]
Random Read 4KB (QD=32) : 0.439 MB/s [ 107.1 IOPS]
Random Write 4KB (QD=32) : 0.970 MB/s [ 236.9 IOPS]
do not compare absolute numbers (HDD's are different), but dropdown factor and IOPS.
For USB 3.0 random read speed (important for Syzygy probing) is 140x times slower than sequential read.
For SATA/AHCI it is only 2x slower.
IOPS are dramatically different: SATA is 580x times faster by IOPS
Another example SDCZ80-016G-X46 SanDisk USB 3.0 stick
random speed is 13x slower than sequential
For Syzygy it's meaningfull. Latency (access time), I/O per second only matters.
Compare to ATA interface (DMA), USB is CPU-intensive protocol, so expect more nps dropdown.
Compare random vs sequential dropdown for Intel AHCI SATA vs USB 3.0 interfaces:
Intel RST SATA AHCI Drivers
Samsung 840 SSD 250GB
========================
Sequential Read : 514.179 MB/s
Sequential Write : 260.255 MB/s
Random Read 4KB (QD=1) : 24.252 MB/s [ 5921.0 IOPS]
Random Write 4KB (QD=1) : 45.642 MB/s [ 11143.1 IOPS]
Random Read 4KB (QD=32) : 254.315 MB/s [ 62088.6 IOPS]
Random Write 4KB (QD=32) : 179.794 MB/s [ 43895.1 IOPS]
Seagate USB 3.0 HDD
========================
Sequential Read : 61.168 MB/s
Sequential Write : 55.296 MB/s
Random Read 4KB (QD=1) : 0.362 MB/s [ 88.4 IOPS]
Random Write 4KB (QD=1) : 0.953 MB/s [ 232.6 IOPS]
Random Read 4KB (QD=32) : 0.439 MB/s [ 107.1 IOPS]
Random Write 4KB (QD=32) : 0.970 MB/s [ 236.9 IOPS]
do not compare absolute numbers (HDD's are different), but dropdown factor and IOPS.
For USB 3.0 random read speed (important for Syzygy probing) is 140x times slower than sequential read.
For SATA/AHCI it is only 2x slower.
IOPS are dramatically different: SATA is 580x times faster by IOPS
Another example SDCZ80-016G-X46 SanDisk USB 3.0 stick
random speed is 13x slower than sequential
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yanquis1972
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Re: USB 3 Storage for Syzygy WDL files
i am not pretending to know of what i speak, but note that louis's link is to a product that markets itself as an external SSD, not a flash drive.
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zullil
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- Joined: Tue Jan 09, 2007 12:31 am
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- Full name: Louis Zulli
Re: USB 3 Storage for Syzygy WDL files
Yes, this is not a USB 3 flash drive. Wondering now about the effectiveness of the device for tablebase access.yanquis1972 wrote:i am not pretending to know of what i speak, but note that louis's link is to a product that markets itself as an external SSD, not a flash drive.
Specs:
Controller: LSI SandForce 2281 Series with 7% Over Provisioning
Capacity: 120GB (128GB total flash memory with 8GB dedicated to real-time redundancy and error correction)*
Performance: up to 445MB/s read, up to 440MB/s write
Random 4K Performance: up to 39,000 IOPS
Interface Type: USB 3.0 (backward compatible to USB 2.0)
Dimensions: 3.66" x 0.94" x 0.47"
Weight: 2 ounces
Compatibility: Windows XP and higher / Mac OS X 10.4 and higher/Linux**
Warranty: 2 year
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yurikvelo
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Re: USB 3 Storage for Syzygy WDL files
VisionTek mSATA mini USB 3.0 Bus-Powered SSD Enclosure
Benchmark Results: CrystalDiskMark showed that the Kingston 120GB SATA III 6.0Gb/s mSATA drive was getting sequential read and write speeds of 250 and 160 MB/s, which isn’t bad at all. When Joe reviewed this model mSATA SSD on a motherboard with an mSATA slot on it he was getting around 270MB/s read and 160MB/s write, so our numbers are just slightly lower than that. We expected somewhat lower performance due to the fact there is increased latency from the controller that coverts the mSATA drive over to USB 3.0.
Read more at http://www.legitreviews.com/visiontek-m ... FXsJ0rh.99
Results for product marketed SSD pretty much the same, as for SanDisk dongle.
I believe this is USB protocol design, not particular product issue.
Verbatim USB 3.0 External SSD 32 GB
blue - random read, red - random write
http://www.macworld.com/article/2039427 ... ally-.html
Benchmark Results: CrystalDiskMark showed that the Kingston 120GB SATA III 6.0Gb/s mSATA drive was getting sequential read and write speeds of 250 and 160 MB/s, which isn’t bad at all. When Joe reviewed this model mSATA SSD on a motherboard with an mSATA slot on it he was getting around 270MB/s read and 160MB/s write, so our numbers are just slightly lower than that. We expected somewhat lower performance due to the fact there is increased latency from the controller that coverts the mSATA drive over to USB 3.0.
Read more at http://www.legitreviews.com/visiontek-m ... FXsJ0rh.99
Results for product marketed SSD pretty much the same, as for SanDisk dongle.
I believe this is USB protocol design, not particular product issue.
Verbatim USB 3.0 External SSD 32 GB
blue - random read, red - random write
http://www.macworld.com/article/2039427 ... ally-.html