Data deduplication methods: Block-level versus byte-level dedupe
differences between file-level and block-level data deduplication. In this article, I'll assess byte-level versus block-level deduplication. Byte-level deduplication provides a more granular inspection of data than block-level approaches, ensuring more accuracy, but it often requires more knowledge of the backup stream... More...
Copan adds data deduplication to MAID
is adding data deduplication and block-level access to its MAID platform.
Where and how to use data deduplication technology in disk-based backup
at the sub-file level (block level) carves the data into chunks. In general, the block or chunk is "fingerprinted" and its unique identifier is then compared to the index. With smaller block sizes, there are more chunks and, therefore, more index comparisons and a higher potential to locate and eliminate redundancy... More...
Top five data deduplication technology tips of 2009
What about file level and block level dedupe—when should you consider those options? Learn about the fine print of data deduplication technology in this tip.
VM backup strategies: Backing up virtual machines in VMware vSphere
scans the server for new data at the block or file level and backs it up at the next scheduled backup timeframe. That piece of software is typically touted as being "lite," meaning low resource utilization. The most common resource utilization number thrown around in the industry is approximately 2%. How that number is... More...
Source-side data reduction and backup
backup data at its source by doing block-level incrementals has come from companies like NetApp Inc., with it Open Systems SnapVault (OSSV) and the Express Recovery Server (XRS) feature of SyncSort Inc. Backup Express.
EVault backs up VMware
to its backup product, as well as block-level deduplication, encryption and archival modules. The company claims its software is cheaper than most standalone data deduplication products on the market but includes much more functionality.
Is VMware Consolidated Backup right for your enterprise?
CommVault's method is to perform a block-level incremental backup against the raw volume, which is a "truer" incremental backup that offers an easier (and possibly faster) restore than Symantec's approach. However, it must be understood that CommVault's method still requires copying the entire volume from the data store to... More...
Dell's data deduplication strategy: partner for target and host dedupe products
Simpana 8 backup software that does block-level dedupe for disk and tape both as standalone software with any Dell hardware and on its DL2000 disk backup product, and will carry EMC Corp.'s EDL1500 virtual tape library (VTL) under the Dell brand later this year. Dell already sells EMC's Avamar and Symantec Corp.'s PureDisk host... More...
Firm switches from tape to centralized backups at its remote sites
that is, we can't. We needed some type of block-level backup we could push through the WAN and not choke us out on bandwidth."
Abel sees no slowdown in the rate his data will grow, especially if IRET goes ahead with plans to digitize paper documents, some of which are 38 years old.
"A lot of the information we store has to be original... More...
Sepaton claims 50-to-1 data reduction ratio
once data is deduplicated at the block level at what it said is a typical reduction ratio, 25 to 1, that data can then be compressed using the Hifn chip to cut its storage capacity requirement in half again, boosting the typical data reduction ratio to 50 to 1.
Data backup and recovery resources
pros and cons of file-level vs. block-level deduplication
Data backup strategies: Migrating from tape to disk
in-time images) at the storage array level are also considered another form of disk-to-disk backup. Although not technically a "complete copy" in the traditional backup sense, well-planned snapshots offer protection against data loss that's comparable to tape but sometimes it lacks the same level of granularity that... More...
CA adds disk backup application to ARCserve Backup software
senior VP Adam Famularo says its block-level incremental backup reduces storage capacity. D2D does a full backup the first time and incrementals with every subsequent backup.
A product review of free and open-source backup utilities
is not generally a stopping block for many backup/storage administrators. Furthermore, many backup devices, even inexpensive NAS systems, like those reviewed recently in my SearchSMBStorage.com article include backup software such as EMC Corp.'s Retrospect or Memeo Inc. AutoBackup that can back up servers or... More...
Fine-tuning tape storage systems for better data backup performance
is your friend. Logs can alert you to block rewrites, slowdowns, and having to run the tape in reverse to let the data catch up.
You can get the actual speed of the backup by using the time (Linux, Sun OS, etc.) or timeit (Windows) utilities to see how long it takes the system to handle a large file. Dividing the size of the file by the... More...
Two-node cluster over Oracle 9i
to deploy via port (switch) level mirroring. How do I perform the same task on database level?
a) SAN -- how do I have failover
High density file system backup
only way is to back it up at the image level. Most major backup products have this ability, although not all of them allow you to do single file restores from an image backup, and some do not allow you to do incremental backups against an image backup.
Both features are quite important.
What vendors offer backup reporting tools? Who are the major players?
that also offer a pretty high-level monitoring of the backup process.
But the vendors that really fit into this category are the independents who offer multivendor backup reporting solutions. That would include organizations like Aptare, Bocada, Servergraph, which is now part of Rocket Software, Symantec, Tek... More...
VTL costs soar as users hit capacity limits
has seen and, rather than storing a block it has seen previously, it only stores a pointer to it. In the data protection space, Data Domain and Avamar Technologies Inc. both use data reduction in their data protection platforms. Last summer, EMC Corp. VTL spin-off Diligent Technologies Corp. announced its ProtectTier... More...
Microsoft Office SharePoint backup and recovery strategies
of any site data at a granular level is an ordeal. Here's an overview of ways to protect SharePoint content.
Data backup reporting tools evolve
products it can provide the next level of information for the compliance officer's desk but it could also be helpful just because the backup product you are running, say Tivoli or [Hewlett-Packard] HP Data Protection Manager, doesn't have tools that meet your needs."
Addressing challenges associated with Linux backup
today, they are talking about byte-level backups. What I've seen in the Linux environment, is data deduplication at the file-level. For example, with BackupPC, if you are backing up five servers and each server has the same version of a file, the software only backs up that file once.
Brian Posey is a freelance writer focusing... More...
HP StoreOnce's first job is backup data deduplication
take awhile for primary dedupe with block storage. "Primary storage in other kinds of arrays [besides NAS] requires various degrees of work, and you have to consider what performance penalty exists," he said. "Some of the vendors' talk about deduplicating primary storage is a little irresponsible. Putting it in your ERP... More...
Who should be responsible for storage security?
the CEO, even the board of directors level, depending on the corporate structure.
In reality, day-to-day storage security is going to be handled by the network administrator or a storage administrator, if the organization has an individual dedicated to that role. It could possibly defer to an information security... More...
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