Knowledge (XXG)

Fast Virtual Disk

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In summary, the design of FVD takes a principled approach to achieve the following benefits: Strive to make the on-disk data layout identical (or at least as close as possible) to that of a RAW image stored on a raw partition. Eliminate the overhead of a host file system when it can be avoided.
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FVD can be written either directly to a physical or logical blockstore (avoiding host filesystem overheads), or to a regular host file system file. It strives to maintain similarity to raw disk layouts, eliminate host filesystem and disk image
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Eliminate the overhead of a compact image when it can be avoided. Minimize disk I/O overhead for reading on-disk metadata by reducing metadata size. Minimize disk I/O overhead for updating on-disk metadata.
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Convention: Any item in this table that has the form of "A+B" or "A+B+C" indicates a disk format that spans multiple files, where A contains the bulk of the data, and B and C are
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through deduplication of filesystem and block layer storage management.
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overheads, and minimize metadata-related overheads.
354: 316: 248: 186: 102:. IBM T.J. Watson Research Center. January 2011 152: 8: 159: 145: 137: 91: 7: 45:platform. It differs from existing 100:"Fast Virtual Disk (FVD) for QEMU" 14: 412:Virtualization software for Linux 402:Free special-purpose file systems 180:Comparison of disc image software 130:Fast Virtual Disk (FVD) for QEMU 1: 53:between the host and guest 428: 368: 362:Disc Description Protocol 177: 392:Storage virtualization 51:separation of concerns 397:Computer file systems 47:paravirtualization 407:Disk file systems 379: 378: 19:(better known as 17:Fast Virtual Disk 419: 161: 154: 147: 138: 116: 115: 109: 107: 96: 427: 426: 422: 421: 420: 418: 417: 416: 382: 381: 380: 375: 364: 350: 312: 244: 182: 173: 165: 125: 120: 119: 105: 103: 98: 97: 93: 88: 71: 12: 11: 5: 425: 423: 415: 414: 409: 404: 399: 394: 384: 383: 377: 376: 369: 366: 365: 360: 358: 352: 351: 349: 348: 343: 338: 333: 328: 322: 320: 314: 313: 311: 310: 305: 300: 295: 290: 285: 280: 275: 270: 265: 260: 254: 252: 246: 245: 243: 242: 237: 232: 227: 222: 217: 212: 203: 198: 192: 190: 184: 183: 178: 175: 174: 166: 164: 163: 156: 149: 141: 135: 134: 124: 123:External links 121: 118: 117: 90: 89: 87: 84: 83: 82: 77: 70: 67: 43:virtualization 25:virtualization 13: 10: 9: 6: 4: 3: 2: 424: 413: 410: 408: 405: 403: 400: 398: 395: 393: 390: 389: 387: 373: 372:sidecar files 367: 363: 359: 357: 353: 347: 344: 342: 341:IMG, IMA, IMZ 339: 337: 334: 332: 329: 327: 324: 323: 321: 319: 315: 309: 306: 304: 301: 299: 296: 294: 291: 289: 286: 284: 281: 279: 276: 274: 271: 269: 266: 264: 261: 259: 256: 255: 253: 251: 247: 241: 238: 236: 233: 231: 228: 226: 223: 221: 218: 216: 213: 211: 207: 204: 202: 199: 197: 194: 193: 191: 189: 188:Optical discs 185: 181: 176: 172: 169: 162: 157: 155: 150: 148: 143: 142: 139: 132: 131: 127: 126: 122: 114: 101: 95: 92: 85: 81: 78: 76: 73: 72: 68: 66: 64: 58: 56: 52: 48: 44: 41: 37: 34:developed by 33: 30: 26: 22: 18: 318:Floppy disks 262: 171:file formats 128: 111: 106:28 September 104:. Retrieved 94: 59: 20: 16: 15: 80:Open source 63:compression 32:file format 386:Categories 331:DC42, DART 250:Hard disks 168:Disk image 86:References 29:disk image 27:-oriented 326:ADF, ADZ 69:See also 38:for the 225:MDF+MDS 210:CCD+SUB 196:BIN+CUE 55:kernels 23:) is a 356:CD-DA 75:Linux 303:VMDK 288:UDIF 283:QCOW 278:NDIF 108:2013 40:QEMU 346:VFD 336:DMS 308:WIM 298:VHD 293:VDI 273:ISO 268:IMG 263:FVD 258:DMG 240:UIF 235:NRG 230:MDX 220:ISZ 215:ISO 206:IMG 201:DAA 36:IBM 21:FVD 388:: 110:. 374:. 208:+ 160:e 153:t 146:v

Index

virtualization
disk image
file format
IBM
QEMU
virtualization
paravirtualization
separation of concerns
kernels
compression
Linux
Open source
"Fast Virtual Disk (FVD) for QEMU"
Fast Virtual Disk (FVD) for QEMU
v
t
e
Disk image
file formats
Comparison of disc image software
Optical discs
BIN+CUE
DAA
IMG
CCD+SUB
ISO
ISZ
MDF+MDS
MDX
NRG

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