Posted by 
By Volker Herminghaus, Albrecht Scriba
Garage administration in information facilities is helping directors take on the complexity of information middle mass garage. It indicates find out how to take advantage of the possibility of Veritas garage starting place by means of conveying information regarding the layout recommendations of the software program in addition to its architectural heritage. instead of basically showing how to use garage origin, it explains why to use it in a selected method, besides what is going on within. Chapters are break up into 3 sections: An introductory half for the amateur consumer, a full-featured half for the skilled, and a technical deep dive for the pro specialist. an intensive troubleshooting part exhibits easy methods to repair issues of volumes, plexes, disks and disk teams. A image bankruptcy offers specific directions on how you can use the main complex point-in-time copies. A tuning bankruptcy can assist you accelerate and benchmark your volumes. And a unique bankruptcy on break up facts facilities discusses latency concerns in addition to distant mirroring mechanisms and cross-site quantity maintenance. All issues are lined with the technical understand how gathered from an aggregate thirty years of expertise in consulting and coaching in info facilities world wide.
Read or Download Storage Management in Data Centers: Understanding, Exploiting, Tuning, and Troubleshooting Veritas Storage Foundation PDF
Similar computer science books
Designed to provide a breadth first insurance of the sector of desktop technological know-how.
Each one variation of creation to info Compression has greatly been thought of the simplest advent and reference textual content at the paintings and technological know-how of information compression, and the fourth variation maintains during this culture. info compression options and expertise are ever-evolving with new purposes in snapshot, speech, textual content, audio, and video.
Desktops as elements: rules of Embedded Computing process layout, 3e, provides crucial wisdom on embedded platforms expertise and methods. up to date for today's embedded structures layout tools, this variation good points new examples together with electronic sign processing, multimedia, and cyber-physical platforms.
Computation and Storage in the Cloud: Understanding the Trade-Offs
Computation and garage within the Cloud is the 1st complete and systematic paintings investigating the problem of computation and garage trade-off within the cloud on the way to decrease the final software expense. clinical functions are typically computation and information extensive, the place complicated computation projects take decades for execution and the generated datasets are frequently terabytes or petabytes in dimension.
Extra resources for Storage Management in Data Centers: Understanding, Exploiting, Tuning, and Troubleshooting Veritas Storage Foundation
Example text
Therefore, we initialize the second disk of our disk group in the cdsdisk layout. As long as the cds disk group attribute is cleared, we may mix both disk layouts within a disk group. Our slight hope to easily convert disks and disk group by the standard vxcdsconvert command, so that CDS capabilities are activated, is (we might have expected it) immediately dashed. # vxdisksetup -i c4t2d0 privlen=1m # vxdg -g edg adddisk edg02=c4t2d0 # vxdisk -g edg list DEVICE TYPE DISK GROUP STATUS c4t1d0s2 auto:sliced edg01 edg online c4t2d0s2 auto:cdsdisk edg02 edg online # vxcdsconvert -g edg -o novolstop group evac_subdisks_ok=yes privlen=1m VxVM vxcdsconvert ERROR V-5-2-2763 c4t1d0s2: Public and private regions overlap VxVM vxcdsconvert ERROR V-5-2-3120 Conversion process aborted Well, no flight in a luxurious airplane, instead a long exhausting way on foot?
The disk becomes completely online for VxVM, but is, of course, still not a disk group member. # vxdisksetup -i c4t1d0 […] # vxdisk list […] c4t1d0s2 auto:cdsdisk c4t2d0s2 auto:cdsdisk adg02 […] adg01 adg adg online online failed was:c4t1d0s2 355 Troubleshooting 4. The next step is a little bit tricky to understand. We cannot add the disk to the disk group in the usual manner, because the disk media name (adg01 in our example) together with its associated attributes already exists within the disk group configuration: # vxdg -g adg adddisk adg01=c4t1d0 VxVM vxdg ERROR V-5-1-559 Disk adg01: Name is already used Choosing another disk media name does not help: # vxdg -g adg adddisk adg03=c4t1d0 # vxdisk list […] c4t1d0s2 auto:cdsdisk adg03 c4t2d0s2 auto:cdsdisk adg02 […] adg01 adg adg adg online online failed was:c4t1d0s2 Now we have a disk group with three configured disk members, one of them still failed and detached from the disk group.
So take your time and learn the troubleshooting techniques thoroughly first. There is enough material in this chapter to make you an expert if you care to read it and actually do the exercises. So sit down in front of your VxVM host, get yourself your favorite non-alcoholic beverage and let's begin: In order to test several troubleshooting scenarios, we need procedures to simulate some kinds of disk outage, because we do not want to actually destroy disks – even if it may take all of your self control not to destroy all those infernal machines with an axe!