Gigabyte's i-RAM: Affordable Solid State Storage
by Anand Lal Shimpi on July 25, 2005 3:50 PM EST- Posted in
- Storage
Overall Performance
How does the i-RAM impact overall system performance? In order to find out, we installed Winstone on the drive and compared its benchmark results to the Raptor:| Overall Performance Comparison (Higher is Better) | |||||
Business Winstone 2004 |
Multimedia Content Creation Winstone 2004 |
||||
| Gigabyte i-RAM (4GB) | 24.5 |
36.3 |
|||
| Western Digital Raptor (74GB) | 23.9 |
35.4 |
|||
What's very interesting here is that there's very little performance gain from running Winstone on the i-RAM, which tells us that Winstone isn't nearly as disk bound as we originally thought.
We wanted to run other benchmark suites on the i-RAM; however, we ran into capacity issues once again.
One of the biggest advantages of the i-RAM is its random access performance, which comes into play particularly in multitasking scenarios where there are a lot of disk accesses. In order to see if this translates into any tangible real world performance gains, we turned to the Multitasking Business Winstone tests:
"This test uses the same applications as the Business Winstone test, but runs some of them in the background. The test has three segments: in the first, files copy in the background while the script runs Microsoft Outlook and Internet Explorer in the foreground. The script waits for both foreground and background tasks to complete before starting the second segment. In that segment, Excel and Word operations run in the foreground while WinZip archives in the background. The script waits for both foreground and background tasks to complete before starting the third segment. In that segment, Norton AntiVirus runs a virus check in the background while Microsoft Excel, Microsoft Project, Microsoft Access, Microsoft PowerPoint, Microsoft FrontPage, and WinZip operations run in the foreground."
| Winstone Multitasking Performance Comparison (Higher is Better) | |||||
Test 1 |
Test 2 |
Test 3 |
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| Gigabyte i-RAM (4GB) | 5.55 |
2.98 |
3.1 |
||
| Western Digital Raptor (74GB) | 2.78 |
2.93 |
3.04 |
||
The biggest performance gain is in the first multitasking test, which is the file copy test while Outlook and IE run. The performance advantage here is tremendous, with the i-RAM generating a score almost twice that of the Raptor.
The rest of the tests show very little performance improvement. We'd guess that the majority of the boost in the first test is due to the file copy that takes place during the run.
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jconan - Wednesday, July 27, 2005 - link
Of all the disk intensive apps I could think of aren't Bit Torrents a bit disk intensive? Would I-Ram make a good match for Bit Torrents?robmueller - Tuesday, July 26, 2005 - link
I agree with the people who mention server uses for this product. There are already quite a few products like this around in the server space, but they are all VERY expensive. There's a comprehensive list here:http://www.storagesearch.com/ssd-buyers-guide.html">http://www.storagesearch.com/ssd-buyers-guide.html
The one thing to note, most of these are flash based drives, which means they retain their data, but are actually quite slow transfer speed wise. When it comes to pure performance solutions (which are usually DRAM with battery and/or HD backup), there's only a couple of companies:
http://www.umem.com/Umem_NVRAM_Cards.html">http://www.umem.com/Umem_NVRAM_Cards.html
http://www.superssd.com/default.asp">http://www.superssd.com/default.asp
http://www.curtisssd.com/products/">http://www.curtisssd.com/products/
http://www.cenatek.com/product_rocketdrive.cfm">http://www.cenatek.com/product_rocketdrive.cfm
http://www.hyperossystems.co.uk/07042003/products....">http://www.hyperossystems.co.uk/07042003/products....
http://www.taejin.co.kr/english/product_intro.html">http://www.taejin.co.kr/english/product_intro.html
We've been long time users of micro memory products, and in general they've been great. We place database journals, filesystem journals, and general server "hot" files on the device and get great performance out of it.
The biggest issue with most of these is price and support. Rocket Drive is Windows only (we have Linux srevers). HyperDrive doesn't appear to be shipping yet (we ordered one and haven't heard anything). Jetspeed I've never even been able to get a sensible reply from. Curtis seem to be focussing on fibre channel (their SCSI interface drive is now quite old, only 80MB/s), which means you need to spend an extra $1000 almost on just a controller. RamSan are incredibly expensive and FC only, but apparently have amazing performance as well. Umem does have a Linux driver, but Umem are no longer selling their retail, they are only selling wholesale to big storage vendors that use them in their products.
So that basically left us really interested in iRAM as a potential long term replacement for for Umem in new servers we buy. It's a pity that the apparent performance is a bit lacking. On the other hand, the biggest advtange of RAM based drives is the latency reduction. Basically you can write and have your data commited to "permanent" storage and move along with the next task straight away. This is the whole point of database/filesystem journals. It would be great to test the iRAM with real server scenarios that rely on this low latency ability. Rerunning the database tests with a combination of journal and full database on the drive would be really interesting.
http://www.anandtech.com/IT/showdoc.aspx?i=2447">http://www.anandtech.com/IT/showdoc.aspx?i=2447
Basically it seems that this is a really hard product to sell. There's definitely a market for it in the server space, but most of the people who realise that are big DB/file system users, and are usually willing to spend more to get an "enterprise" like product. It would be really nice if all those "middle" users with database/filesystem/email issues could be shown how to use one of these to significantly extend the life/performance of one of their servers...
Scarceas - Tuesday, July 26, 2005 - link
I see this as a much easier way to run your OS in RAM (hell, I don't think there is a way to run XP on a RAM partition).If you have 4GB of RAM, you can partition 3.5GB and run win9x in it. That leaves the max 512MB conventional RAM for 9x to work with. It takes a lot of work, but I think it is faster than this because you don't have the PCI bus constraint, and the RAM controller on a motherboard is probably flatout superior.
It would be interesting to see a comparison...
Scarceas - Tuesday, July 26, 2005 - link
Why did the 300mb file from the drive to itself take ~4 times as long as the 693MB file from the drive to itself?what am I missing?
Antiflash - Wednesday, July 27, 2005 - link
It is a 300mb folder containing several files that could be located in diferent positions which means a more random access. The other is a unique file, it is larger but the data is read from adyacent positions in the disc. In the first case you have to add the overhead of the procesing time of the OS when dealing with several files.JarredWalton - Wednesday, July 27, 2005 - link
Actually, you need to make it a bit more clear: it's the Firefox source code, which is likely thousands of small files. It's not just a few or many, but *TONS* of little files. Even though the access times of the i-RAM are much lower than that of a standard HDD, there is still latency associated with the SATA bus and other portions of the system, so it's not "instantaneous". Three times as fast is still good, and that's relative to the Raptor - something like a 7200 RPM drive would be even slower relative to the i-RAM. Still, best case scenario for heavy IO seems to suggest the current i-RAM is only about 3X faster than a good HDD setup. Good but not great.- Tuesday, July 26, 2005 - link
There's only one comment so far in this entire thread that really touches on where the i-Ram is truly going to succeed, and a few posters flirt with the notion in an offhanded manner.The benefits of an i-Ram would really come out during I/O intensive operations, as in high volumes of reads and writes, without really being high data transfer volumes, which is the case for a lot of database operations. A lot of the tests performed in the article really had a focus of large volume data retrieval, and that's like using the haft of a katana to hammer in a nail.
Think about web bulletin boards like PHP-nuke, Slashcode, PHPBB, any active dynamic website that is constantly accessing a database to load user preferences, banner ads, static images. Forum posting, article retrieval, content searching, etc. An applicable consumer example would be putting your web browser's cache on the I-Ram, or your mail or news reader's data files, or dumping a copy of your entire document's folder to it, then using Windows' search function to dig through them all for all occurences of "the". Throw a squid cache on it. Put your innoDB transaction log on it. Hell, for that matter, slot a handful of these and use them as innoDB raw partitions for your data.
The kinds of tests you need to perform to make an I-Ram shine would be high volumes of simultaneous searches across the entire volume, the kind of act that would make a regular disk drive grind to a screaming halt in a fit of schizophrenic head twitching. This isn't video editing, OS booting (with exceptions), game loading, or most of the scenarios commented on above. It's still a SATA drive. Your bulk data isn't going to transfer any faster, but you *can* find it quicker and open, update, and close your files faster. Leverage *those* strengths and stop thinking it's a RocketDrive.
Bensam123 - Tuesday, July 26, 2005 - link
All my concerns on this product were pretty much addressed-SATA2
-5.25" Bay drive instead of PCI slot
-Using a 4pin Molex connector or SATA power connector instead
-PCI-E instead of SATA (drivers are made everyday)
A few comments I have on this product that weren't mentioned. Everyone talked about putting these into a Raid0 array to improve size but no one mentioned that it could very well double performance. I don't know what's causing the current bottle necks with these cards besides the SATA interface but that just doesn't seem right. Anand needs to run benchmarks like Sisoft File System Benchmark or HD Tach to narrow it down. Read/Write/Sequential and Random should all be almost instaneous only limited by the bandwidth of SATA and the bridge it is attached to. This card could very well be limited by the chipset they tried it on (southbridge/northbridge interconnet). It might be even faster on a chipset that lacks a southbridge and only has a northbridge such as the nForce4.
Given the nature of this product I don't know why motherboard manufacturers just don't add this right onto a board or make a special adapter for it you can buy (with a better interface). I could see alot more use in something like this if the dimms were attached right to my board and straight to my notherbridge.
What Gigabyte should've done (all companies with a bright idea should do this) is just give this to review sites such as Anand and others just to see what feedback emerges before they try to market something like this. I guess Gigabyte is sort of doing this by only producing 1,000 but that's still 1,000 more then they need to. If my guess is correct the second revision of this product should follow quite shortley after this one hits the market.
As was mentioned the price is a killer (I would rather get a SCSI320 controller and a 15,000 RPM Cheetah).
nullpointerus - Tuesday, July 26, 2005 - link
The bandwidth, which could have really blown SATA drives out of the water in certain tasks, is obviously crippled by its attachment to SATA. Yet if i-RAM was running at full PCI Express speed, then I should think opening the specs for the memory controller would quickly lead to open source drivers. The storage is, after all, cheap DDR sticks.Sure, these drivers might be written for Linux or BSD instead of Windows, but surely porting GPL'd drivers to Windows would be easy for a company which can open the specs? nVidia and ATI have proprietary drivers because they claim it would be suicide for them to open up their proprietary chip interfaces. But i-RAM?
nullpointerus - Tuesday, July 26, 2005 - link
I thought that compilation would make a good application for this. Source code, intermediate, and output files take up less than 4 GB. The large amount of small text files involved should allow the i-RAM's random access performance advantage to really shine. Add to that the fact that long compiles can take several hours - or days if you are building Gentoo, for example - and the difference should be quite noticable. Yet there don't seem to be any compiler tests in this article. Maybe they simply aren't I/O limited?