Replies – Forums – Alex Gerulaitis – Page 3

Forum Replies Created

Page 3 of 118

← 1 2 3 4 … 118 →

Alex Gerulaitis
January 22, 2014 at 3:16 am in reply to: RAID 50 loses half the expected speed?

It looks like R380 flatlines at 800MB/s. Puzzling though that RAID50 gives you worse performance vs. RAID5 with half the drives. Possibly it slows down as it works with more drives / RAID groups.

R680 then, or perhaps ARC-1882x.

— Alex Gerulaitis | Systems Engineer | DV411 – Los Angeles, CA
Alex Gerulaitis
January 22, 2014 at 12:10 am in reply to: RAID 50 loses half the expected speed?

I’ve never tried anything similar on a R380 so all I can offer are wild guesses.

Is it possible to reformat the array in RAID0 across all drives and test speeds? (It’d be a PITA to initialize RAID5 again – yet this would be a good test to measure R380 max throughput.)

What does ATTO say about R380 performance ceiling in RAID5?

Also, R380 seems to support RAID50 natively. Any reason you decided on soft (OS) striping?
Alex Gerulaitis
January 21, 2014 at 11:44 pm in reply to: RAID 50 loses half the expected speed?

Any chance the R380 is in a 4x slot? I believe it’s PCIe 1.0 and the 4x config could partially explain the 800MB/s speed cap… I think…

— Alex Gerulaitis | Systems Engineer | DV411 – Los Angeles, CA
Alex Gerulaitis
January 20, 2014 at 2:02 am in reply to: Why RAM Preview 2x faster on Macbook Pro vs Desktop PC?

Could you check your per-core CPU usage, memory usage on each system during RAM preview?

— Alex Gerulaitis | Systems Engineer | DV411 – Los Angeles, CA
Alex Gerulaitis
January 19, 2014 at 12:10 am in reply to: NSF Funny Business

Have you tried forcing smb1 (cifs)?
Alex Gerulaitis
January 19, 2014 at 12:09 am in reply to: Nimble Storage and iSCSI

[David Gagne] “from a media standpoint I hear “iscsi” and shudder.”

Why?
Alex Gerulaitis
January 17, 2014 at 9:37 pm in reply to: AE laptop recommendations (for up to $3000)

32GB 1600MHz RAM, good SSD, i7-4700 or faster. The rest is personal choice. Many gaming laptops support that, and so do Dell M4800 and 6800, some HP Z-books.
Alex Gerulaitis
January 16, 2014 at 11:58 pm in reply to: Nimble Storage and iSCSI

Echoing Bob’s and Nate’s comments… why Nimble? Are their products used at TV stations or studios for video workflows?

Also, what are those “department policies”? A while list of vendors? Specific uptime and resiliency requirements?
Alex Gerulaitis
January 13, 2014 at 6:27 pm in reply to: Upgrading network infrastructure to 10gigE

[Chris Smith] “Any recommendations on a 10gigE PCI card for a Mac pro and a combo switch that will work for speed of video editing over 1gig”

Any of the switches mentioned above will work for mixed 1/10GbE environments.

Video editing: what are the speed requirements? (E.g.: four edit stations each working with a maximum of four ProRes HQ 422 220Mbs streams simultaneously would mean approx. 80MB/s per node and 320MB/s minimum aggregate speed requirements.)

10GbE card for the Mac Pro: PETG1-CAT6A or PETG2-CAT6A cards from Small-Tree. Let me know if you’d like a quote.

— Alex Gerulaitis | Systems Engineer | DV411 – Los Angeles, CA
Alex Gerulaitis
January 12, 2014 at 10:27 pm in reply to: Upgrading network infrastructure to 10gigE

[Chris Smith] “Does the cabling need to be Cat6a or will cat6 suffice?”

6a is always better. 6 will suffice with quality cables and if you’re within its length limitations.

Page 3 of 118

← 1 2 3 4 … 118 →