Developers Club geek daily blog

NetApp becomes even more effective with inline dedupe

1 year, 4 months ago
The Data ONTAP 8.3.2RC1 version became a few days ago available. "RC" means Release Candidate and consequently, according to the rules of naming of versions accepted in NetApp, this release already passed all internal tests and can be used by customers not only for an assessment of new opportunities, but also for a produktiv, including systems at which business and critical tasks work. Support of vendor completely extends to the systems working at "RC" Data ONTAP versions.

Sellers of NetApp (yes, it and we too ;) are not tired to remind (and do it perfectly) that high utilization of disk resources in the NetApp systems is reached due to use of software of optimization — a deduplication and a compression.

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Hackers attack what to do?

1 year, 5 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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Large-scale research of failures of Flash of drives (overview of article)

1 year, 7 months ago
Not so long ago the most interesting research of "A Large-Scale Study of Flash Memory Failures in the Field" behind authorship of Qiang Wu and Sanjev Kumar from Facebook, and also Justin Meza and Onur Mutlu from Carnegie Mellon University has been published. The main outputs from article with small comments are lower.

Now, when flash drives are very actively used as high-performance replacement to hard drives, reliability plays them more and more important role. Failures of chips can lead to idle times and even data loss. For development of understanding of processes of change of reliability flash memory in actual practice of the loaded project the research provided in the discussed article has been conducted.

Authors have collected extensive statistics in four years of operation of flash drives in Facebook data-centers.

As many for certain know, Facebook long time was the best (and the basic) the client of the Fusuion-IO company (SANdisk is now bought), which has started releasing one of the first PCI-e flash drives.
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As a result of the carried-out analysis of collected data, number of interesting outputs has been made:

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Современные RAID контроллеры Adaptec от А до Я. Часть 2

1 year, 7 months ago
Ранее публиковал первую часть, в которой описывались общие сведения о RAID контроллерах (азы читать здесь), были вопросы и интерес, выкладываю уже «мясной» кусок. Здесь всё очень конкретно – подробная классификация контроллеров Adaptec, функции каждой серии контроллеров, таблицы, картинки и т.д.

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Modern RAID Adaptec controlers from And to I. Part 1

1 year, 8 months ago
Recently has come across useful and very detailed article Adaptec which described well simply all nuances of operation of controlers, scarecrows unless volume in 60 pages. There was natural desire to reduce and separate article into 2 pieces:
  • Part 1. General information about RAID controlers (it is a lot of theories, elements)
  • Part 2. Classification of Adaptec controlers (here everything is very specific – series of controlers, functions of each series, the table, the picture)

Material will be interesting to all who is connected with data storage – to engineers integrators, system administrators and ultimate users.

Actually, Part 1.

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Who is stronger — elephant or … elephant?

1 year, 9 months ago
The Lenovo company has provided two new disk S2200 and S3200 systems recently. They are expected, first of all, small business. The competition in this market quite active — among the most active players of HP with systems MSA, Dell about MD3, NetApp E2700 and FAS2500, EMC VNXe, IBM V3700 and a number of B-brands.

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Comparison of HP 3PAR 10000 with new high-end HP 3PAR 20000 system

1 year, 9 months ago
At last HP Discover conference new high-end the HP 3PAR 20000 system was declared (model 20800 supports both ssd, and normal disks, and model 20850 — only ssd). In comparison with 3PAR 10000, there is a lot of changes (in commemoration of it and number of model exchanged twice), the system became not only is much more productive, and also got rid of a rudimentary fibre channel as interconnect between controllers and disk regiments. Taking into account that "ten-chiliarch" asked on rest for a long time, I even am a little surprised that this announcement happened now, but not last year.

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Testing of the shelf of Intel® Storage System JBOD 2000 Family

2 years ago
Just recently I happened to test the disk shelf from the Intel® company. "It would seem that can be surprising in the normal disk shelf," - I have thought, but after detailed consideration of regiment it was not absolutely typical. Actually, I will also tell about it.


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