Storage Management in Data Centers: Understanding, Exploiting, Tuning, and Troubleshooting Veritas Storage Foundation

By Volker Herminghaus, Albrecht Scriba

Garage administration in facts facilities is helping directors take on the complexity of information heart mass garage. It exhibits find out how to take advantage of the potential for Veritas garage beginning by way of conveying information regarding the layout options of the software program in addition to its architectural heritage. instead of simply showing how to use garage starting place, it explains why to use it in a specific method, in addition to what is going on within. Chapters are break up into 3 sections: An introductory half for the amateur person, a full-featured half for the skilled, and a technical deep dive for the professional specialist. an intensive troubleshooting part exhibits the right way to repair issues of volumes, plexes, disks and disk teams. A photograph bankruptcy supplies designated directions on the way to use the main complicated point-in-time copies. A tuning bankruptcy might help you accelerate and benchmark your volumes. And a distinct bankruptcy on break up information facilities discusses latency matters in addition to distant mirroring mechanisms and cross-site quantity maintenance. All issues are lined with the technical know the way gathered from an aggregate thirty years of expertise in consulting and coaching in facts facilities world wide.

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330 10. 7 guide Encapsulation Walkthrough . . . . . . . . . . . . . . . . . . 338 10. 7. 1 Assumptions and stipulations . . . . . . . . . . . . . . . . . . . 338 10. 7. 2 uncomplicated concerns . . . . . . . . . . . . . . . . . . . . . . . . . . 339 10. 7. three Storing the Disk structure . . . . . . . . . . . . . . . . . . . . . . . . 340 10. 7. four Defining inner most and Public quarter . . . . . . . . . . . . . . . . 340 10. 7. five growing Subdisks, Plexes, and Volumes . . . . . . . . . . . . . 341 10. 7. 6 Mirroring and getting ready for CDS . . . . . . . . . . . . . . . . . . 345 10. 7. 7 changing to CDS . . . . . . . . . . . . . . . . . . . . . . . . . . . . 348 XVI Table Of Contents eleven Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 349 eleven. 1 advent . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 349 eleven. 2 Disk Outage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 352 eleven. 2. 1 Disk completely broken . . . . . . . . . . . . . . . . . . . . . 355 eleven. 2. 2 Disk quickly Unavailable . . . . . . . . . . . . . . . . . . . . 358 eleven. 2. three changing an OS Disk . . . . . . . . . . . . . . . . . . . . . . . . . . 359 eleven. three Disk Outage intimately . . . . . . . . . . . . . . . . . . . . . . . . . . . . 362 eleven. three. 1 an entire Disk Array briefly Unavailable . . . . . . . 362 eleven. three. 2 A Disk team quickly Inaccessible . . . . . . . . . . . . . . 363 eleven. three. three Failed Disk ("Failing") . . . . . . . . . . . . . . . . . . 365 eleven. three. four scorching Relocation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 367 eleven. three. five sizzling Spare . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 374 eleven. four Synchronization initiatives . . . . . . . . . . . . . . . . . . . . . . . . . . . . 380 eleven. four. 1 Optimizing Resynchronization . . . . . . . . . . . . . . . . . . . 380 eleven. four. 2 Controlling Synchronization habit . . . . . . . . . . . . . . 383 eleven. five fix of misplaced VxVM items . . . . . . . . . . . . . . . . . . . . . . 391 eleven. five. 1 vxprint and vxmake features . . . . . . . . . . . . . . . . . . 391 eleven. five. 2 restoration of All Volumes in a Disk team . . . . . . . . . . . . . 392 eleven. five. three repair of a few Volumes in a Disk crew . . . . . . . . . . . 393 eleven. five. four fix of the total Disk staff Configuration . . . . . . . 394 eleven. five. five restoration of a Destroyed Disk staff . . . . . . . . . . . . . . . . 398 eleven. five. 6 Serial cut up mind of a Disk crew . . . . . . . . . . . . . . . . . 401 eleven. 6 Booting with out VxVM . . . . . . . . . . . . . . . . . . . . . . . . . . . 406 eleven. 7 greater than OS Mirrors: Emergency Disk . . . . . . . . . . . . 412 eleven. eight scorching Relocation problems . . . . . . . . . . . . . . . . . . . . . . . . . . 420 eleven. eight. 1 Plex Synchronization Skipped . . . . . . . . . . . . . . . . . . . . 420 eleven. eight. 2 Unrelocation of cut up Subdisks . . . . . . . . . . . . . . . . . . . 424 eleven. nine Plex States review . . . . . . . . . . . . . . . . . . . . . . . . . . . . 426 12 dossier structures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 429 12. 1 Block dependent dossier structures . . . . . . . . . . . . . . . . . . . . . . . . . . 429 12. 1. 1 only for enjoyable: Commodore 64's Rudimentary dossier entry . . 430 12. 1. 2 fats – now not an important development . . . . . . . . . . . . . . . . . . . . 430 12. 1. three UFS – eventually whatever first rate . . . . . . . . . . . . . . . . . . 432 12. 2 volume dependent dossier structures . . . . . . . . . . . . . . . . . . . . . . . . . 434 12. 2. 1 VxFS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 434 12. three complex dossier approach Operations . . . . . . . . . . . . . . . . . . . . 441 12. three. 1 precis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 445 thirteen Tuning garage starting place . . . . . . . . . . . . . . . . . . . . . . . 447 thirteen. 1 fundamentals approximately Tuning garage beginning . . . . . . . . . . . . . . 447 thirteen. 1. 1 Tuning VxVM through the use of average Parameters . . . . . . . . 449 thirteen. 1. 2 figuring out and enhancing VxVM Defaults . . . .

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