zfs
Xen 4.1.3 Hypervisor testing on Debian 7.0 via the Phoronix Test Suite.


2GB larc: 

	Processor: AMD Opteron 6348 @ 2.80GHz (4 Cores), Memory: 4096MB, Disk: 4001GB HGST HDS724040AL

	OS: Debian 7.0, Kernel: 3.9.4-2013061402 (x86_64), Compiler: GCC 4.7, File-System: zfs, System Layer: Xen 4.1.3 Hypervisor

2GB larc 512MB ZIL: 

	Processor: AMD Opteron 6348 @ 2.80GHz (4 Cores), Memory: 4096MB, Disk: 4001GB HGST HDS724040AL

	OS: Debian 7.0, Kernel: 3.9.4-2013061402 (x86_64), Compiler: GCC 4.7, File-System: zfs, System Layer: Xen 4.1.3 Hypervisor


Flexible IO Tester 1.57
Test: Intel IOMeter File Server Access Pattern
Seconds (Run Time) < Lower Is Better
2GB larc ........... 314.54 |==================================================
2GB larc 512MB ZIL . 297.01 |===============================================


SQLite 3.7.3
Test Target: Default Test Directory
Seconds < Lower Is Better
2GB larc ........... 36.28 |==================================================
2GB larc 512MB ZIL . 36.71 |===================================================


Threaded I/O Tester 0.3.3
Test: Read - Size Per Thread: 64MB - Thread Count: 4
MB/s > Higher Is Better
2GB larc ........... 821.96 |==================================================
2GB larc 512MB ZIL . 588.54 |====================================


Threaded I/O Tester 0.3.3
Test: Write - Size Per Thread: 64MB - Thread Count: 4
MB/s > Higher Is Better
2GB larc ........... 157.46 |==================================================
2GB larc 512MB ZIL . 76.35  |========================


Threaded I/O Tester 0.3.3
Test: Random Read - Size Per Thread: 64MB - Thread Count: 4
MB/s > Higher Is Better
2GB larc ........... 716.73 |==================================================
2GB larc 512MB ZIL . 573.48 |========================================


Threaded I/O Tester 0.3.3
Test: Random Write - Size Per Thread: 64MB - Thread Count: 4
MB/s > Higher Is Better
2GB larc ........... 194.36 |==================================================
2GB larc 512MB ZIL . 102.22 |==========================


PostgreSQL pgbench 8.4.11
TPC-B Transactions Per Second
TPS > Higher Is Better
2GB larc ........... 1190.86 |=================================================
2GB larc 512MB ZIL . 1166.36 |================================================


Apache Benchmark 2.4.3
Static Web Page Serving
Requests Per Second > Higher Is Better
2GB larc ........... 12596.00 |================================================
2GB larc 512MB ZIL . 12568.11 |================================================