80,492 reputation
769182
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location England, United Kingdom
age 45
visits member for 5 years, 7 months
seen 3 hours ago

mmm...delicious cheese, oh and I design and build large video-on-demand systems, but let's get back to the cheese...


Oct
3
comment RAID0 : best chunk size for fileserver with average 650KB files
@klaasio - it doesn't work that way, the fourth disk wouldn't be less busy as the writing 'wraps around' usually - the issue with 128KB is that 4 of them is only 512KB, so on an average file you're going to have to read 8 chunks not 4, why not test these various options?
Oct
2
comment Is it realistic to host ESXi on a cloud VPS?
Not heard a worse idea for a long while.
Oct
2
comment how to choose right SFP 1000BASE-T transceiver?
No, me neither, what's wrong with a cheapo Intel card without SFP?
Oct
2
comment how to choose right SFP 1000BASE-T transceiver?
I wouldn't use any of those, drop Solarflare an email asking for a copy of their supported-SFPs.
Oct
2
comment CISCO Catalyst switch API
Look at Cisco's own CiscoWorks software
Oct
2
comment Linux on VMware - why use partitioning?
Oh and I just wanted to comment how impressed myself and some of the other 'high-rep' users of SF were with your first question. We get accused sometimes of beating up new guys but it's really just that a lot of new users don't read what we're about and what we're not - so I thought I should just say thanks for asking an appropriate question in a well written and considered way :)
Oct
2
answered Linux on VMware - why use partitioning?
Oct
2
answered migrate from raid 5+1 (spare) to raid 50 without losing data on hp p420i smart array
Oct
1
comment ESX SAN overbooked, what happens if storage limit reached?
Damn, can't delete an accepted answer :(
Oct
1
comment ESX SAN overbooked, what happens if storage limit reached?
Fair enough, I don't use it so was assuming it did what happens to physicals, good spot, I'll delete shortly.
Oct
1
comment RAID0 : best chunk size for fileserver with average 650KB files
With four disks in R0 I'd be tempted to go with a 256KB chunk as that means you should be able to store one whole file in one chunk per disk which should help with the random-read. What would help more would be to use faster disks in R10 but I'm assuming budget is an issue here. What are you going to do when you lose the array by the way, I'd imagine this will happen around once a year.
Oct
1
comment Network access sometimes lost, disabling port security temporary solves?
Anyone running a client-based hypervisor such as VMWare Fusion/Workstation or that bloody-awful virtualised-XP in Vista? They can generate a second MAC down the link you see.
Oct
1
comment Persistent Disk Name in RedHAt Cluster on VMWare Workstation-10.01
I don't think you're helping yourself here by using VMWare Workstation - you can do this sort of thing but really you should be using ESXi for this instead, I think it'd go much smoother.
Oct
1
comment RAID0 : best chunk size for fileserver with average 650KB files
How many disks are you looking at using in this R0 and what will be doing the 'raiding', a hardware controller or software?
Oct
1
comment RAID0 : best chunk size for fileserver with average 650KB files
How big is the total volume size needed for this, the reason I ask is that for very small files such as this I've had some really good results with PCIe-based flash (FusionIO in my case) than with R0 - but obviously it's more expensive hence my volume question. Have you no 1MB option?
Oct
1
comment How many volumes on NAS?
@spirited - just to reiterate what SvW said - it's almost negligent of NAS manufacturers to be selling RAID5 devices these days - we can bore you with the details but it boils down to today's large slow disks such as yours essentially guaranteeing write errors when fully written to - so in the event of any disk failing you'll replace that disk and it WILL have data on it that can't ever be read again - RAID6 or 10 don't have this problem - use those. Oh and one big volume and don't store backup data anywhere near primary data ok.
Sep
30
awarded  Explainer
Sep
30
answered ESX SAN overbooked, what happens if storage limit reached?
Sep
29
comment difference between FLR-SFP+ and SFP+?
Ed, the Gen9 DL360/380 has a non-removable 4 x 1Gbps copper module AND a FlexLOM port
Sep
29
comment Xen cannot see all the LUNs in ISCSI HP StorageWorks MSA2312i Dual Controller Modular Smart Array
you're going to have to add a lot more detail to the actual problem here; logs etc?