Access "Dense wavelength division multiplexing for disaster recovery"
This article is part of the Vol. 2 No. 7 September 2003 issue of Is it time for SAN/NAS convergence?
Dealing with distance Something to keep in mind as we delve deeper into this solution space is the distance in miles between the sites supporting your applications. The latency associated with the speed of light over an optical cable equates to a single data or management frame taking one millisecond per 100 miles. To address this latency, switch vendors recommend that you allocate more frame buffers at both endpoints of the long-distance storage area network (SAN) link. Increasing the frame buffers at both ends will allow the transmitting E_Port to have more frames in flight without waiting for an acknowledgment (ACK) from the receiving E_Port for having received previously sent frames. How many buffers should your E_Port support? Well, it depends on two things. For one, it depends on whether the application in question is synchronous or asynchronous in nature. The more synchronous, the more buffers you will need. It also depends on the speed and distance among connecting E_Ports. The greater the speed and distance, the more buffer credits you will need to ... Access >>>
Premium Content for Free.
Federal Regulations Spur Interest in Tape Encryption
Are federal regulations making you paranoid?
by Jeff Moad
In the first of three stories profiling organizations at various stages of storage networking, we look at those who have chosen to wait and find out why.
- WORM Option Seals Tape Library Sale
Firm finds happiness with startup vendor
Happiness is a 3PAR array
Can Disk Speed Up Lethargic Backups?
Is disk-based backup right for your shop?
RAID Making its Way to the Motherboard
Gartner sees RAID on the motherboard
Where tape belongs
by David Braue
Ignore the industry babble about whether tape is dead or not: Tape is here to stay. But with the advantages of new low-cost disk systems--especially for fast restoration--tape's role in backup will likely change. The upshot: You'll likely be using your libraries differently.
- Federal Regulations Spur Interest in Tape Encryption
SAN/NAS convergence: proceed with caution
by Michael Desmond
Until recently, various barriers separated network-attached storage and storage area networks. New hybrid SAN-NAS solutions promise many benefits, but do they actually deliver them?
The case for high-end arrays
The gap between midrange and high-end storage arrays has narrowed, enough so that the decision of which storage array to buy is less of a technical decision and more of a business one.
Windows Storage Server 2003 Debuts
Windows storage server has arrived.
Protect your SAN from attack, part 2
by W. Curtis Preston
We continue our security series by looking at how to provide strong authentication for SANs, otherwise known as zoning. The trick is to find the right zoning technique that meets your needs for both security and convenience.
Linux: a good deal with drawbacks
As Linux servers gain acceptance, the question of how Linux plays on storage networks arises. Not so bad, is the short answer, but not as well as you might hope, either.
- SAN/NAS convergence: proceed with caution by Michael Desmond
Dense wavelength division multiplexing for disaster recovery
by Darryl Brooks
It's been two years now since the attacks on the World Trade Center and the Pentagon, and there are new options for disaster recovery. In this first of a two-part series, we critique DWDM.
Centralizing remote-office data backup
by Jon Oltsik
Centralize your backup, or you may never be able to recover from disasters. You may also fail to comply with federal regulations.
Keeping more useless data online
Storage Bin: We may be keeping more data online than ever before, but we are also keeping more useless data online as well.
Avoiding backup nightmares with data backup reports
by James Damoulakis
The key to avoiding common backup nightmares that plague most storage managers is having clearly defined backup reports.
Snapshot: Backup procedures
What's Your Backup Philosophy?
Now that the lights are back on...
by Mark Schlack
Now that the lights are back on...
- Dense wavelength division multiplexing for disaster recovery by Darryl Brooks
More Premium Content Accessible For Free
For the eleventh year, Storage magazine and SearchStorage editors offer their list of storage technologies likely to have an impact on data...
Scale-out network-attached storage (NAS) is the primary technology to handle big data needs in the media and entertainment (M&E) space. Using ...
Our Storage magazine/SearchStorage.com 2013 Salary Survey offers encouraging news: pay for storage pros rose again to an average of $98,082. ...