FCIP Routers – A Best Practice Design Tip

Many years ago a Glaswegian friend of mine quoted someone as saying that the 1981 anti-apartheid protests in New Zealand (South African rugby tour) showed that New Zealand was not just a floating Surrey as some had previously suspected. While the Surrey reference might be lost on those not from England, I can tell you [...]

Easy Tier is even better than we thought!

IBM storage architects and IBM Business Partners are encouraged to use Disk Magic to model performance when recommending disk systems to meet a customer requirement. Recently v9.1 of Disk magic was released and it listed nine changes from v9. This little gem was one of them: “The Easy Tier predefined Skew Levels have been updated based [...]

XIV Gen3 Sequential Performance

Big Data can take a variety of forms but what better way to get a feeling for the performance of a big data storage system than using a standard audited benchmark to measure large file processing, large query processing, and video streaming. From the www.storageperformance.org website: “SPC-2 consists of three distinct workloads designed to demonstrate [...]

A Small Challenge with NAS Gateways

SAN Volume Controller Late in 2010, Netapp quietly announced they were not planning to support V Series (and by extension IBM N Series NAS Gateways) to be used with any recent version of IBM’s SAN Volume Controller. This was discussed more fully on the Netapp communities forum (you’ll need to create a login) and the reason given [...]

You can’t always get what you want

There have been a raft of new storage efficiency elements brought to market in the last few years, but what has become obvious is that you can’t yet get it all in one product.

Maximum Fibre Channel Distances

Just a quick hit and run blog post for today… This table authored by Karl Hohenauer just came into my inbox. With the changes in cable quality (OM3, OM4) the supported fibre channel distances have confused a few people, so this will be a good reference doc to remember.

Where Should I Shove This Solid State Drive?

Everyone agrees that enterprise-class SSDs from companies like STEC Inc are fast, and cool, and pretty nice. Most people also realise that SSDs are an order of magnitude more expensive than SAS drives, and that there is no expectation that this will change dramatically within the next 5 years. This means we have to figure out [...]

Storwize V7000 Vs the Rest – a Quick SPC-1 Performance Roundup

This post is in response to the discussion around my recent Easy Tier performance post.

IBM’s New Midrange with Easy Tier & External Virtualization

Yes, IBM has announced a new midrange virtualized disk system, the Storwize V7000. A veritable CLARiiON-killer : )

Does my midrange look big in this?

IDC defines three categories of external disk. The midrange market leaders are EMC, Netapp and IBM (followed by Dell and HP with both slipping slightly over the last 12 months). Netapp is almost entirely a midrange business, while EMC and IBM are the market leaders in highend. Over the last 4 quarters midrange has accounted [...]

ALL YOUR BASE ARE BELONG TO US

There are four reasons I can think of why a company wants to buy another: To take a position in a market you didn’t expect to be in but has suddenly become important to you (e.g. EMC buying VMware) To take a position in a market you did expect to be in, but the internal [...]

When Space, Time & Vendor Charges Collide…

Well the whole snapshot and replication thing got me thinking about vendor licensing. Licensing is a way to get a return on one’s R&D, it doesn’t really matter whether customers pay x for hardware and y for software, or x+y for the hardware ‘solution’ and zero for software functions etc, as long as the vendor [...]

Is it time for the Enterprise Linux Server?

IBM’s Z10 Enterprise Linux Server is an interesting alternative to a large-scale VMware deployment. Essentially, any Linux workload that is a good fit for being virtualised with Vmware is a good fit for being virtualised on Z10.

Hey this Gibibyte stuff is really taking off!

So you know we’re making progress on the binary units thing (see my post entitled “How many fingers am I holding up“) when Piratebay.org starts using GiB… 7,368,671,232  Bytes   =    7.37 GB     or    6.86 GiB Now if we can only get the IT vendor community to consistently follow Piratebay’s excellent [...]

How many fingers am I holding up?

The base2 Vs base10 nett capacity question is an interesting one. It remains a place of confusion for customers and that’s not surprising as it remains a place of confusion for vendors also.

IBM Easy Tier with SATA and SSD

IBM has just published a very cool 33,000 IOPS SPC-1 benchmark result for the DS8000 using 96 x SATA and 16 x SSDs (not a FC drive in sight!) and with a max latency well under 5ms. I’m impressed. This is a great piece of engineering. Easy Tier was left to automatically learn the SPC-1 [...]