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Notice how the ephemeral SSD is 10x-30x faster on reads, and 4x-18x faster on writes? Not to mention that the ephemeral drive is completely free with your VM.

Note how you can type in the bottom box of CrystalDiskMark’s results – see how I typed Amazon General Purpose SSD? That’s great for making notes that will be visible in the screen shots to help you determine which test results came from which machine.Īnd here is a set from an ephemeral SSD locally attached to that same EC2 VM: Here’s a sample set of results from a 335GB general purpose SSD volume in Amazon EBS: Usually I find that during the first round of storage tests, it’s not performing well period – and it doesn’t make sense to bring SQL Server into the game just yet. We’re not looking to get an exact representation of SQL Server’s IO patterns here – we’re just trying to get a fast, one-button-click-easy measurement of how storage performs. SQL Server stores stuff on disk in 8K pages, and zooming out a little, groups of 8 8KB pages (64K extents). The more astute readers (and by that I mean you, you good-looking charmer) will notice that 4K operations don’t really measure SQL Server’s IO. RND4K Q1T1 – Ignore, SQL Server doesn’t work like this.This is somewhat akin to an active OLTP server, or a TempDB drive. RND4K Q32T16 – random tiny operations, but many done at a time.SEQ1M Q1T1 – ignore, SQL Server doesn’t work like this.For SQL Server, this is somewhat akin to doing backups or doing table scans of perfectly defragmented data, like a data warehouse. SEQ1M Q8T1 – lots of long, sequential operations.While it runs, here’s an explanation of each row’s results: You want to test where your data, log, and TempDB files live, and for fun, also test the C drive and your desktop or laptop for comparison.Īfter making your choices, click the All button. Keep an eye on the free space there – you don’t want to create a test file that can run your server out of drive space. Just know that the bigger the test file, the longer it takes to generate. Smaller test file sizes may look fast but don’t really reflect how a large database will work. If you’re under the gun, do a quick 1GiB test, but for real go-live prep, I like using 32GB to reduce the chances that I’m just hitting cache and getting artificially fast numbers. If you want a fast seat-of-the-pants guess, do 1, but keep in mind it can be wildly variant between passes if something else happens to be going on in the SAN. 1 – the number of test passes you want to run.

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The zip version can be just saved to a network share, and then anybody can run it from there.Īfter extracting the zip file’s contents, run DiskMark64.exe on an idle server or desktop first (not your live SQL Server, because it’ll slow things down while it runs.) It’ll look like this:Īcross the top, set the first three dropdowns to: The zip version doesn’t require an installer, which is cool because I’m not a fan of installing things on production servers.

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There are multiple download links – you want CRYSTALDISKMARK, not CrystalDiskInfo, and you want the Standard Edition, Zip Version. Go to the CrystalDiskMark download page, but PAY CLOSE ATTENTION. (I’ll be charitable and not tell you which one.) Instead, let’s get seat-of-the-pants numbers for your storage. It takes knowledge and time, and you only have one of those.

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Bartering spots like /r/homelabsales or even LTT's forum have been solid - es.I’ve written about how to test your SAN’s performance with SQLIO, but I’ll be honest with you: that’s the hard way. and those are OK but generally I've noticed better pricing when you can find the more fringe hole-in-the-wall types of online marketplaces. Where do you buy used tech from? Hardware.For those of us with children (or you may have heard this growing up yourself), I am glad to say that this actually happened on this day in History! I wis.

Today in History: 1664 Old New Amsterdam Becomes New YorkOld New York, was once New Amsterdam.

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I'm curious if you still have POTS and if not what did you transition those services to (e.g. There's been a lot of discussion about Plain Old Telephone Service (POTS) going away since PRIs are being phased out across the US. No AD, no sort of access control, using O365.How would YOU take the next step? AD? Azure AD? Some. If you were starting from a clean slate, how would you set up an office? Let's say that there are several users using local accounts on Windows laptops.

Starting from a clean slate: how would you set up an office? Windows.

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