Developers Club geek daily blog

Data ONTAP 8.3 ADP: FlashPool StoragePools

1 year, 3 months ago
Data ONTAP 8.3 cDOT OS is one of the greatest releases of NetApp. One of key features of release is the Advanced Drive Partitioning (ADP) technology, in the previous article I considered application of this technology for Root-Data Partitioning, in same I suggest to consider the internal StoragePools device. In more detail about what new is in cDOT 8.3 here.

StoragePools is similar to Root-Data Partitioning which also uses a partitsionirovaniye providing a new method to distribute SSD a cache for hybrid units.

Hybrid unit


The StoragePool technology was developed especially for hybrid units that it is more rational to distribute SSD a cache between them. For example at you in system it is set only 4 SSD, and the cache wants to be made for 2, 3 or even 4 units, here you will be come to the rescue by ADP.

So, for a start it is necessary to create StoragePool and to add there the SSD set of disks.



All disks in StoragePool'e will be broken into equal 4 parts. It is not configured anywhere, the system always razobjt them on equal 4 parts. It is possible to have several Storagepool'ov. Creating StoragePool, by default, partition equally will be divided between two notes of HA system, but it can be changed.

The set of first (P1), second (P2), third (P3) and fourth (P4) of partition of the disks StoragePool'a is called Allocation Unit respectively (AU1, AU2, AU3, AU4).


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Collocation in the theory and in practice

1 year, 3 months ago
The idea to lease the space for the server became the answer to promptly growing requirements of the IT market. To create and to fully equip own date the center — business quite costly and troublesome. But also, not always it is necessary. Therefore services of a collocation so quickly found popularity in the market of a hosting. And for rather short period this type of business underwent a number of changes which allowed it not only to remain actual in a new era of information technologies, but also to offer something special.



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Big data from And to I. Part 3: Acceptances and strategy of development of MapReduce-applications

1 year, 3 months ago

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"Stored procedures" in Redis

1 year, 3 months ago
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Many know about an opportunity to store procedures in sql databases, about it many chubby manuals and articles are written. However very few people know that similar opportunities are available also in Redis, starting with version 2.6.0. But as Redis is not a relational DB, and the principles of the description of stored procedures rather strongly differ. Stored procedures in Redis — almost full-fledged Lua scripts (at the time of writing of article as the interpreter Lua 5.1 is used).

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Backup reefs in hybrid storage systems

1 year, 3 months ago


Certainly, data protection methods from loss are defined both by the information volume, and the device on which they are stored. Both that, and another constantly evolves.

Therefore long ago disputes between supporters of traditional approach to backup and those who look for the new methods of data protection more convenient from the point of view of architecture of the used storage systems are conducted. Now this dispute escalated as recently a variety of types of storage systems sharply grew. Use of some of them demands to change approaches to usual problems of operation and ensuring availability, including backup about which I want to talk here.

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Fujitsu ETERNUS CD10000 S2: any news?

1 year, 4 months ago
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Approximately a year ago we told about Fujitsu ETERNUS CD10000 – the ready solution prepared by our company for fast expansion of horizontally scalable system of the program defined data storage based on open source software of Ceph and the rack Fujitsu PRIMERGY servers. ETERNUS CD10000 is scaled from four to 224 nodes of storage and 50 PBytes of capacity. On the first of October this year there was a second generation of ETERNUS CD10000 S2 in which a number of important improvements is implemented. What?

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non-FlexPod DC: Direct-Attached Storage, Support "from one hands"

1 year, 4 months ago
In one of the articles I told what is architecture of FlexPod DC and what it consists of, treat the physical FlexPod DC components: SHD NetApp of the FAS series, Cisco UCS and Nexus server switches. There is a big variety of the supported designs of FlexPod DC consisting of these three main a component. To use cooperative support from "one hands" existence of the corresponding service of support is necessary for all these a component.

What if you have Cisco SnartNet and NetApp Support Edge services, and in architecture there are no Nexus switches, at this SHD is directly included in UCS Fabric Interconnect?

It is also "a не-FlexPod of DC" architecture about which the speech will go, she can be supported from "one hands" according to the Cisco "Solution Support for Critical Infrastructure" (SSCI) program too.


The general design of a SAN network with a live broadcast

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Webinar the third. Backup as tranquility basis. Schemes of backup

1 year, 4 months ago
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The scheduled webinar of the centos-admin.ru company will take place on the next Thursday at 11-00 Moscow time.

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Hackers attack what to do?

1 year, 4 months ago
Last week (October, 2015) the old friend appealed to me to help. There was at them an accident to accounts department.

We are familiar with the company long ago, we are on friendly terms with the director families years 10. About 1.5 years ago they asked us for the help, but for some reasons refused our services. As a result signed the agreement with the company 1C of the franchisee which began to service them far off. The company assured that everything will be good, for the time being.

But here, once the accountant cannot enter, there is no database, and in 10 days delivery of tax accounting.

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4 reasons to risk to pass to program defined TsOD-u

1 year, 4 months ago


For the last 3 years only the federation of EMC has helped to unroll program defined TsOD-y in more than 1000 organizations worldwide, having completely saved the available infrastructure, having optimized its use for ensuring business processes. And according to the made supervision, in most cases come to the similar decision of the company quickly and even it is unexpected for itself. Therefore even if now the program defined TsOD (further for brevity — POTsOD) seems to you something very much exotic, do not hurry to renounce its implementation. Risks of carrying out serious changes in the IT organization are intuitively clear. In this article advantages of transition to POTsOD and 4 common causes of their creation in the organizations are considered.

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