Storage performance can get a bit complex, but the underlying statement is true. 10k or 15k have similar performance, for the most part. If you put them side by side doing the type of work that disks are worst at (random small-block IO), you will measure a difference, but the reality is that with most … Read more
There are several reasons to deploy a routed approach to Fibre Channel: You have separate, disconnected islands you want to connect but the effort to ensure that no conflicts exist in the zoning databases is extreme. You have separate islands of connectivity, such as a Brocade-based FC fabric and a Cisco-based FCIP fabric that you … Read more
https://stackoverflow.com/questions/18292/what-are-some-good-ssh-servers-for-windows What is a good SSH server to use on Windows?
There is no problem. Even if there is still available RAM, the Linux Kernel will move memory pages which are hardly ever used into swap space. It’s good to swap out memory pages that have been inactive for a while, keeping often-used data in cache; this is the desired situation of the Kernel. You can … Read more
Being able to run fstrim on the / partitions would be the best solution however with they way your ESXi is configured it would not be possible. You need to be able to enable discards on both the VM and the storage device. Trying to reduce to size of a partition or logical volume with … Read more
NAS Definitely not NAS for SQL Server. SMB/CIFS does not have adequate support for file locking to support a DBMS (at least it didn’t a few years ago, ca. 2002-2003). Note that NFS does and you can actually do this with Oracle on an NFS server. However, SQL Server on a CIFS share is not … Read more
I am an Oracle DBA. Your new DBA is acting like alot of Oracle DBAs and over engineering. NO oracle does NOT need 38 LUNs. I have spread data files out on large numbers of lun’s but these are on systems that are VERY active and VERY large. LUNs don’t necessary map to new RAID … Read more
The key to a good VMWare storage platform is understanding what kind of load VMWare generates. First, since you host a lot of servers, the workload is typically random. There are many IO streams going at the same time, and not many of them can be successfully pre-cached. Second, it’s variable. During normal operations, you … Read more
Marketing. 7.2K drives are slower and easier to produce, and with higher error thresholds which improves yields (and capacity). However, in terms of I/O operations each discrete disk can support, the 7.2K drives are markedly less performant than their faster brethren. Therefore they get the ‘Nearline’ moniker, as they’ll hit I/O saturation much faster than … Read more
We have had some ups and downs. Including finding our first ONTAP bug before we’d deployed and producing some certain benchmark conditions that weren’t quite what we expected. But that probably makes it sound worse than it really is. In service it has functioned very well and I wouldn’t hesitate recommending them to someone else. … Read more