Daniël van EedenThe new cloud backup option of MySQL Enterprise Backup (17.8.2014, 21:29 UTC)
MySQL Enterprise Backup 3.10 support backups to the cloud. The only supported cloud service is Amazon S3.

When the cloud destination is used mysqlbackup will upload the backup as an image file.

You can specify all options on the commandline:
mysqlbackup --cloud-service=s3 --cloud-aws-region=eu-west-1 \
--cloud-access-key-id=AKIAJLGCPXEGVHCQD27B \
--cloud-secret-access-key=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 \
--cloud-bucket=meb_myserver --cloud-object-key=firstbackup --cloud-trace=0 \
--backup-dir=/tmp/firstbackup --backup-image=- --with-timestamp backup-to-image

But you can also put the settings in the my.cnf

The with-timestamp option is important as the backup won't start if the backup-dir already exists. This is because mysqlbackup will leave the backup directory exists after uploading the backup. The backup directory will only have meta info and the log file, not the actual backup.

By using a group suffix like _cloud you can put settings for multiple types of backups in one cnf file.

mysqlbackup --defaults-group-suffix='_cloud' \
--cloud-object-key=backup_2014081701 backup-to-image

The account you're using should have this policy to be allowed to read and write to the s3 bucket:
"Version": "2012-10-17",
"Statement": [
"Sid": "Stmt1408302840000",
"Effect": "Allow",
"Action": [
"Resource": [

This looks like a good option to me if you're already using mysqlbackup and amazon. It would be nice if the next version would support other cloud providers (e.g. openstack swift, ceph). Implementing this should be easy for those with an s3 compatibility layer, but will probably take more time for others.

I did find some bugs (just search for tag=cloud on http://bugs.mysql.com if you're interested).
Jean-Jerome SchmidtWe’re Hiring! And Looking to Add More 9s to the Severalnines Team! (15.8.2014, 09:07 UTC)
August 15, 2014
By Severalnines




We're looking for an energetic and talented web developer to join our small but agile web team. This position is full-time and pay is negotiable. The hours are flexible and work can be done remotely.


Severalnines is a self-funded startup with a dozen employees; headquartered in Stockholm, Sweden and with a globally distributed, home-office based team. We provide automation and management software for database clusters. Our ClusterControl product is the leading management application for database clusters and is used by thousands of companies.


We were founded in 2010 and launched our product that same year, so you’ll be working on a popular, tried & tested product. There is opportunity to have an immediate impact though as we’re a small team and there is plenty of work to be done as we continue to enhance our product.


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Peter ZaitsevMake a difference! See the world! Speak at Percona Live London; Santa Clara! (15.8.2014, 07:00 UTC)

Make a difference! See the world! Speak at Percona Live (London; Santa Clara)Twice each year members of the global open-source community converge on London in November and Santa Clara in April to network with, and learn from, some of the world’s most experienced and accomplished system architects, developers and DBAs.

And now it’s time for YOU to give back to this diverse and growing MySQL community. The Call for Speakers for Percona Live London (Nov. 3-4) closes Aug. 17 and the deadline for submitting talks for the ever-growing Percona Live MySQL Conference and Expo (April 13-16, 2015) expires Nov. 9.

If you like putting things off until the last minute, then it’s time to get to work! Aug. 17 is just two days away and November will be here before you know it (think of how fast summer has gone by already).

Close your eyes and visualize the beauty of London in November (well, usually)…. :) And who doesn’t enjoy spring in Silicon Valley? Think BIG: Why not submit papers for BOTH conferences? Be a MySQL jetsetter! If your proposal(s) is approved by the Conference Committee then you’ll receive a complimentary full-conference pass. (You’ll have to pay for London’s fish ‘n’ chips and Santa Clara’s famed fish tacos, though. Sorry!)

Make a difference! See the world! Speak at Percona Live (London; Santa Clara)!I’ve said it before (yes, just up above, but it’s important): Your participation in Percona Live London and the Percona Live MySQL Conference and Expo are opportunities to make a difference… to give back to the MySQL community. Don’t worry about being fancy. Some of the most popular talks have been on simple topics. Many people come to the conferences to learn – and we need content for MySQL newcomers as well as the veterans.

Struggling to come up with an idea? Share what you know; share what you’ve learned… the good, the bad and the ugly. These stories are gold and you owe it to the MySQL community to share them – because doing so could save the day of those who hear your tale.

It’s GO time….

  • Click here to submit your speaker proposal (yes, more than one submission is OK) for Percona Live London (November 3-4 at the Millennium Gloucester Conference Center).
  • Click here to submit your speaker proposal (again, the more the merrier) for the Percona Live MySQL Conference & Expo 2015 (April 13-16, 2015 at The Hyatt Regency Santa Clara and Santa Clara Convention Center).

Questions? Need some advice or help with your submission? Let me know in the comments section and we can connect via email. I look forward to hearing from you! I also have five limited-edition Percona t-shirts to send to the first five people who submit a talk and let me know about it here in the comments section (and yes, I will check to confirm!).

One more (OK, more than one) thing:

  • Phone your colleagues, friends and family alerting them that Early Bird pricing for Percona Live London ends Aug. 31!
  • Super Saver registration discounts for the Percona Live MySQL Conference & Expo 2015 are available through Nov. 16 (at 11:30 p.m. PST)!
  • Sponsorship opportunities (this is HUGE!) for next April’s Percona Live MySQL Conference & Expo 2015 are available! Sponsors become a part of a dynamic and growing ecosystem and interact with more than 1,000 DBAs, sysadmins, developers, CTOs, CEOs, business managers, technology evangelists, solutions vendors, and entrepreneurs w

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Jean-Jerome SchmidtNew Webinar: Performance Tuning of HAProxy for Database Load Balancing (13.8.2014, 14:00 UTC)
August 13, 2014
By Severalnines


New Webinar: Performance Tuning of HAProxy for Database Load Balancing

As a follow-up to our previous webinar on MySQL Load Balancing and HAProxy, we are glad to organize a new webinar on Performance Tuning of HAProxy. Tuning your HAProxy instances can significantly increase the performance of your application and decrease response times. Joint us for this special session to find out more!


Date, Time & Registration: 

Tuesday, September 9th @10am CEST (Europe & MEA / Asia Pacific)

Register here

Tuesday, September 9th @6pm CEST (North America / LATAM)

Register here


This webinar will cover the performance tuning basics for HAProxy and explain how to take advantage of some of the new features in 1.5, released in June 2014 after 4 years of development work. We’re delighted to be joined by a well known HAProxy expert, Baptiste Assmann. 



  • New features in HAProxy 1.5
  • What can HAProxy tell you about your application and your database
  • OS/Network performance tuning for databases with short living connections
  • Handling persistent connections
  • Dynamic re-configuration
  • HAProxy multi-process: advantages and limitations
  • HAProxy active/active failover setups
  • Security considerations



Joining us this time is Baptiste Assmann, Product Manager at HAProxy Technologies and a contributor to the HAProxy project.


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Chris CalenderMariaDB 10.0.13 Overview and Highlights (12.8.2014, 19:22 UTC)

MariaDB 10.0.13 was recently released, and is available for download here:


This is the fourth GA release of MariaDB 10.0, and 14th overall release of MariaDB 10.0.

This is primarily a bug-fix release.

Here are the main items of note:

  1. InnoDB upgraded to 5.6.19.
  2. XtraDB upgraded to 5.6.19-67.0.
  3. TokuDB upgraded to 7.1.7.
  4. Performance_Schema upgraded to 5.6.20.
  5. Connect engine supports partitioning.
  6. Many plugins have had their maturity level increased (from beta to gamma or from gamma to stable).
  7. filesort-with-small-limit-optimization is now visible through the slow query log and a new status variable, sort_priority_queue_sorts.
  8. New variables aria_pagecache_file_hash_size and key_cache_file_hash_size for determining the number of hash buckets for open and changed files for Aria and MyISAM respectively.

You can read more about the 10.0.13 release here:


And if interested, you can review the full list of changes in 10.0.13 (changelogs) here:


Hope this helps.


Jean-Jerome SchmidtClustering Moodle on Multiple Servers for High Availability and Scalability (12.8.2014, 12:48 UTC)
August 12, 2014
By Severalnines

Moodle is an open-source e-learning platform (aka Learning Management System) that is widely adopted by educational institutions to create and administer online courses. For larger student bodies and higher volumes of instruction, moodle must be robust enough to serve thousands of learners, administrators, content builders and instructors simultaneously. Availability and scalability are key requirements as moodle becomes a critical application for course providers. In this blog, we will show you how to deploy and cluster moodle/web, database and file-system components on multiple servers to achieve both high availability and scalability. 


We are going to deploy moodle on top of GlusterFS clustered file system and MariaDB Galera Cluster 10. To eliminate any single point of failure, we will use three nodes to serve the application and database while the remaining two are used for load balancers and the ClusterControl management server. This is illustrated in the following figure:




All hosts are running on CentOS 6.5 64bit with SElinux and iptables disabled. The following is the host definition inside /etc/hosts:      moodle web db virtual-ip mysql         moodle1 web1 db1         moodle2 web2 db2         moodle3 web3 db3         lb1         lb2 clustercontrol


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Peter ZaitsevBenchmarking IBM eXFlash™ DIMM with sysbench fileio (12.8.2014, 12:00 UTC)

Diablo Technologies engaged Percona to benchmark IBM eXFlash™ DIMMs in various aspects. An eXFlash™ DIMM itself is quite an interesting piece of technology. In a nutshell, it’s flash storage, which you can put in the memory DIMM slots. Enabled by Diablo’s Memory Channel Storage™ technology, this practically means low latency and some unique performance characteristics.

These devices are special, because their full performance potential is unlocked by using multiple devices to leverage the parallelism of the memory subsystem. In a modern CPU there is more than one memory controller (4 is typical nowadays) and spreading eXFlash™ DIMMs across them will provide maximum performance. There are quite some details about the device that are omitted in this post, they can be found in this redbook.

Diablo technologies also provided us a 785 GB FusionIO ioDrive 2 card (MLC). We will compare the performance of it to 4 and 8 of the eXFlash DIMMs. The card itself is a good choice for comparison because of it’s popularity, and because as you will see, it provides a good baseline.


CPU: 2x Intel Xeon E5-2690 (hyper threading enabled)
FusionIO driver version: 3.2.6 build 1212
Operating system: CentOS 6.5
Kernel version: 2.6.32-431.el6.x86_64

Sysbench command used:

sysbench --test=fileio

The variables above mean the following:
Size: the devices always had 50% free space.
Test_mode: rndwr, rndrw, rndrd for the different types of workloads (read, write, mixed)
Rtime: 4 hours for asynchronsous tests, 30 minutes for synchronous ones.
Mode: sync or async dependening on which test are we talking about.

From the tdimm devices, we created RAID0 arrays with linux md (this is the recommended way to use them).
In case of 4 devices:

mdadm --create /dev/md0 --level=0 --chunk=4 --raid-devices=4 /dev/td{a,c,e,g}

In case of 4 devices:

mdadm --create /dec/md0 --level=0 --chunk=4 --raid-devices=8 /dev/td{a,b,c,d,e,f,g,h}

The filesystem used for the tests was ext4, it was created on the whole device (md0 or fioa, no parititions), which the block size of 4k.

We tested these with read-only, write-only and mixed workloads with sysbench fileio. The read/write ratio with the mixed test was 1.5. Apart from the workload itself, we varied the IO mode as well (we did tests with synchronous IO as well as asynchronous IO). We did the following tests.

  • Asynchronous read workload (16 threads, 16k block size, 4 hour long)
  • Asynchronous write workload (16 threads, 16k block size, 4 hour long)
  • Asynchronous mixed workload (16 threads, 16k block size, 4 hour long)
  • Synchronous read workload (1..1024 threads, 16k block size, 0.5 hour long)
  • Synchronous write workload (1..1024 threads, 16k block size, 0.5 hour long)
  • Synchronous mixed workload (1..1024 threads, 16k block size, 0.5 hour long)

The asynchronous read tests lasted 4 hours, because we tested the consistency of the device’s performance with those over time.

Asynchronous IO



The throughput is fairly consistent. With 8 dimms, the peak throughput goes above 3 GB/s in case of 8 eXFlash DIMMs.


At the beginning of the testing we expected that latency would drop significantly in case of eXFlash DIMMs. We based this assumption on the fact that the memory is even “closer” to the processor than the PCI-E bus. In case of 8 eXFlash DIMMs, it’s visible that we are able to utilize the memory channels completely, which gives a boost in throughput as well as it gives lower latency.


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Colin CharlesMySQLNoSQLCloud 2014 – Edition #3 (10.8.2014, 07:27 UTC)

Good morning buenos airesI’ve enjoyed visiting Buenos Aires once a year for the MySQLNoSQLCloud event, put together by the awesome people at Binlogic (in particular, their proprietor Santiago Lertora). It’s happening again in 2014, which by my count is the third edition, and there’s a twist: Buenos Aires on 13 & 14 November, and Cordoba on 17 November. It’s never been held in Cordoba before (like an annex event), so I think this could be extremely exciting.

If you’re looking to speak, send Santiago a note at events@binlogic.com (or leave a message here). I’ll put you in touch with him. If you’re looking to sponsor, you get attendees from all over Latin America.

Peter ZaitsevRelease Candidate Packages for Red Hat Enterprise Linux 7 and CentOS 7 now available (8.8.2014, 13:56 UTC)

The Percona team is pleased to announce the Release Candidate for Percona Software packages for Red Hat Enterprise Linux 7 and CentOS 7.

With more than 1 million downloads and thousands of production deployments at small, mid-size and large enterprises, Percona software is a industry leading distribution that enhances the performance, scale, management and diagnosis of MySQL deployments.

This new packages bring the benefits of Percona Software to developers and administrators that are using Red Hat Enterprise Linux 7 and CentOS 7.

The new packages are available from our testing repository. The packages included are: :

In addition, we have included systemd service scripts for Percona Server and Percona XtraDB Cluster.

Please try out the Percona Software for Red Hat Enterprise Linux 7 and CentOS 7 by downloading and installing the packages from our testing repository as follows:

yum install http://repo.percona.com/testing/centos/7/os/noarch/percona-testing-0.0-1.noarch.rpm

Help us improve our software quality by reporting any bugs you encounter using our bug tracking system. As always, thanks for your continued support of Percona!

NOTE: These packages aren’t Generally Available (GA) and thus are not recommended for production deployments.

The post Release Candidate Packages for Red Hat Enterprise Linux 7 and CentOS 7 now available appeared first on MySQL Performance Blog.

Peter ZaitsevPercona Toolkit 2.2.10 is now available (8.8.2014, 13:07 UTC)

Percona ToolkitPercona is glad to announce the release of Percona Toolkit 2.2.10 on August 8, 2014 (downloads are available here and from the Percona Software Repositories). This release is the current GA (Generally Available) stable release in the 2.2 series.

Bugs Fixed:

  • Fixed bug 1287253: pt-table-checksum would exit with error if it would encounter deadlock when doing checksum. This was fixed by retrying the command in case of deadlock error.
  • Fixed bug 1311654: When used with Percona XtraDB Cluster, pt-table-checksum could show incorrect result if --resume option was used. This was fixed by adding a new --replicate-check-retries command line parameter. If you are having resume problems you can now set --replicate-check-retries N , where N is the number of times to retry a discrepant checksum (default = 1 , no retries). Setting a value of 3 is enough to completely eliminate spurious differences.
  • Fixed bug 1299387: pt-query-digest didn’t work correctly due to a changed logging format when field Thread_id has been renamed to Id. Fixed by implementing support for the new format.
  • Fixed bug 1340728: in some cases, where the index was of type “hash” , pt-online-schema-change would refuse to run because MySQL reported it would not use an index for the select. This check should have been able to be skipped using --nocheck-plan option, but it wasn’t. Option --nocheck-plan now ignores the chosen index correctly.
  • Fixed bug 1253872: When running pt-table-checksum or pt-online-schema on a server that is unused, setting the 20% max load would fail due to tools rounding the value down. This has been fixed by rounding the value up.
  • Fixed bug 1340364: Due to incompatibility of dash and bash syntax some shell tools were showing error when queried for version.

Percona Toolkit is free and open-source. Details of the release can be found in the release notes and the 2.2.10 milestone at Launchpad. Bugs can be reported on the Percona Toolkit launchpad bug tracker.

The post Percona Toolkit 2.2.10 is now available appeared first on MySQL Performance Blog.

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