The Virtual Desktop Infrastructure Storage Behaviors and Requirements Spencer Shepler Microsoft

Transcription

1 The Virtual Desktop Infrastructure Storage Behaviors and Requirements Spencer Shepler Microsoft

2 Storage for Hyper-V 2012 Hyper-V VMs container formats VHD VHDX (new) Stacked on top of regular file system NTFS (single node) CSV with NTFS (multi-node shared) SMB3.0 provides network attached storage 2

3 SMB3.0 (advantages for Hyper-V) Active recovery Client involved in recovery process Witness identifies alternative nodes Multi-channel (aggregated multiple physical links) Resiliency Performance RDMA enablement Lowers overhead for client and server Returns CPU to guests 3

4 MiB / sec SMB 3.0 Multi-channel Performance 4500 Multiple 10 GbE Scalability with SMB x 10GbE x 10GbE x 10GbE x 10GbE

5 Hyper-V VM on-disk Container or set per VM.xml (VM configuration details).bin (VM memory image) (saved VM).vsv (saved state from devices).vhd/.vhdx (VM hard disks).avhd (VM differencing disks) 5

6 Gold and Diff Disk relationships Gold/Master OS+Apps.vhdx Desktop 1.avhdx Desktop 2.avhdx Desktop N.avhdx Snapshot.avhdx Snapshot.avhdx Snapshot.avhdx.bin.bin.bin 6

7 VHDX Improvements Capacity up to 64TB Logging of metadata updates Alignment updates 4KB logical sector size 1MB alignment for allocations Unmap / TRIM support Still supports: fixed, dynamic, differencing 7

8 Windows Server 2012 VDI Deployment methods for VDI Personal Desktop Pooled Desktop Personal Desktop is full OS image Pooled Desktop Single golden VHDX image contains OS Child or pooled instance is delta from golden VHDX Child is then customized with hostname, active directory, etc. Child is then saved 8

9 Test Environment Software Windows Server 2012 Hyper-V Desktops: Windows 7 SP1 Workload Generation: Login VSI Hardware 2 node cluster (each node running separate desktop collection) 2 socket E52640 (12 cores total) 64GB memory 2-way mirror Storage Spaces 48 x 10K rpm 2.5 HDD 9

10 Login VSI (desktop interaction) Workload Copy file Open Word document, edit, and save Print in PDF format Find and replace text in Notepad and Word Compress files using 7Zip Navigate and read s in Outlook PowerPoint - edit a presentation Browsing websites Using Freemind create a hierarchical set of ideas around a central concept Desktop Login Frequency 30 seconds Workload generation started randomly after login 10

11 VSI Max 11

12 Desktop Login Resume Desktop Read <desktop>.bin Read <desktop>.vsv User login Attach User-VHD (profile data) 12

13 VM Restore (read of.bin) bin read sequential sizes over time IO Size

14 Comparison of VM Restores bin load comparison IO Size IO Size

15 Gold VHDX Activity ~14GB VHDX Total Size 77 GB read over 1 hour Only Reads IO Size Range 512 bytes 1 MB 25K Average I/O size 16K or less 50% of all I/Os 32K or less 88% of all I/Os 15

16 Gold VHDX I/O size distribution 1 I/O Count Cumulative Distribution Percentage of Total IOs 16

17 Distribution of All I/O Read + Write 8K or less 50% of total I/Os 64K or less 90% of total I/Os Read Only 16K or less 50% of total 64K or less 90% of total Write Only 4K or less 70% of total 20K or less 90% of total 17

18 I/O activity over lifetime of run Writes (in red) Reads (in pink) Flush (dark) 18

19 AVHD Activity Read/Write ratio is 1/10 Flush/Write ratio is 1/10 Read & Write Size Distribution 4K or less 50% 64K or less 90% Range: 512 1MB 19

20 At the end 85 Active Desktops 2000 I/Os 2:1 Read / Write ratio 20

21 Questions 21

22 The Virtual Desktop Infrastructure Storage Behaviors and Requirements Spencer Shepler Microsoft