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Displaying posts with tag: Hardware (reset)

we use tcpcopy to make real traffic on our core systems. Many problems will be found in advance if we enlarge queries several times.


Infiniflash Benchmark

Sandisk (FusionIO) and Nexenta are working together to build this SDS solution.

Infiniflash is a very large SDS production, which manages for very large DW system who requires large storage space and also high IOPS.

We test infiniflash system ,read this Infiniflash_benchmark

MySQL distributed message system

Based on messages, we create mysql replication platforms , using async message to build strong distributed subscription system.

read this PDF :


Hello dear readers and attendees,

This is the post that I will be/ will have been referencing during my presentation to the Seattle Central Community College’s Byte club on Thursday, December 10th at 1500-1630.

I will begin with a bit of an autobio and find out what kind of students we have in attendance. Please feel free to comment if you’d like to keep in touch before or after the presentation. I will discuss some of the bits and pieces of some industry standard platforms which I’ve developed, deployed, maintained, managed, co-operated, administered and replaced. We can discuss some of the patterns that work well in the industry, and some that are a bit harder to tame.

Once we have touched most of the areas of specialization represented at the meeting, I will dive in to an AngularJS demo I am developing in github here:

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TokuDB benchmark on PCIe

MariaDB TokuDB benchmark on FusionIO ,Compare TokuDB and InnoDB engines.

read: TokuDB_benchmark

NVMFS Supports Atomic Writes

Benchmark for NVMFS (supports atomic writes ,so we can close double-write option on specific MySQL version )

tips: some Flash-based cards could support large block map , the main idea is to avoid fractured page writes.

How to Purchase [Benchmarking] Hardware on a Budget

One of my goals at Acmebenchmarking is make sure I'm running on hardware that is representative of real-world infrastructure, while at the same time doing it as inexpensively as possible.

To date I've been running on two custom built "desktops" (for lack of a better term). Both have an Intel Core i7 4790K processor (quad core plus hyperthreading, 4Ghz), 32GB RAM (dual channel), and a quality SSD. They are named acmebench01 and acmebench02.

Alas, it is time to expand. MUST...PURCHASE...MORE...HARDWARE!

In order to maintain the inexpensive theme I tend to buy used hardware, my goal on this purchase was to achieve many more cores and greater memory bandwidth than my existing machines can provide. Keep in mind that used hardware is great for benchmarking (and likely development and QA environments) but you might want to avoid it for production. For years now I've been purchasing used hardware …

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How to improve InnoDB performance by 55% for write-bound loads

During April’s Percona Live MySQL Conference and Expo 2014, I attended a talk on MySQL 5.7 performance an scalability given by Dimitri Kravtchuk, the Oracle MySQL benchmark specialist. He mentioned at some point that the InnoDB double write buffer was a real performance killer. For the ones that don’t know what the innodb double write buffer is, it is a disk buffer were pages are written before being written to the actual data file. Upon restart, pages in the double write buffer are rewritten to their data files if complete. This is to avoid data file corruption with half written pages. I knew it has an impact on performance, on ZFS since it is transactional I always disable it, but I never realized how important the performance impact could be. Back from PLMCE, a friend had dropped home a Dell R320 server, asking …

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GUUG Frühjahrsfachgespräch 2014: CfP ends on May 31st!

The German Unix User Group (GUUG) will hold their annual conference "Frühjahrsfachgespräch" on September 23-26 this year (I know, not really "Frühjahr" anymore, but this is how it is).

The Call for Presentations is still open until May 31st. Talks can be proposed in German and English, and there are slots for longer tutorials as well.

The range of possible topics is broad, so if you think you have anything interesting to share with a very passionate and technical audience of sysadmins and developers, here are some suggestions:

  • Operating Systems/Applications: architectures, privilege concepts, new developments, administration, mobile systems
  • Relevant new OS Kernel features: new developments in Linux-, BSD- or other Spen …
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Linus on Instantiation and Armadaification

I feel a sense of pride when I think that I was involved in the development and maintenance of what was probably the first piece of software accepted into Debian which then had and still has direct up-stream support from Microsoft. The world is a better place for having Microsoft in it. The first operating system I ever ran on an 08086-based CPU was MS-DOS 2.x. I remember how thrilled I was when we got to see how my friend’s 80286 system ran BBS software that would cause a modem to dial a local system and display the application as if it were running on a local machine. Totally sweet.

When we were living at 6162 NE Middle in the nine-eight 292, we got an 80386 which ran Doom. Yeah, the original one, not the fancy new one with the double barrel shotgun, but it would probably run that one, too. It was also …

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