I have been tweaking and researching for a while now and can't seem to get "good" performance out of Gluster. I'm using Gluster to replace an NFS server (c1.xlarge) that serves files to an array of web servers, all in EC2. In my tests Gluster is significantly slower than NFS on average. I'm using a distributed replicated volume on two (m1.large) bricks: Volume Name: ebs Type: Replicate Status: Started Number of Bricks: 2 Transport-type: tcp Bricks: Brick1: 10....:/mnt/ebs Brick2: 10....:/mnt/ebs Options Reconfigured: performance.io-thread-count: 64 performance.cache-refresh-timeout: 60 performance.cache-size: 6GB The web servers are serving pages built with eZ Publish, a CMS that reads a lot of small files to build a page. I'm benchmarking with siege. Here are some sample results I'm getting: With NFS, siege request concurrency 5: Lifting the server siege... done. Transactions: 271 hits Availability: 100.00 % Elapsed time: 61.60 secs Data transferred: 3.11 MB Response time: 1.12 secs Transaction rate: 4.40 trans/sec Throughput: 0.05 MB/sec Concurrency: 4.95 Successful transactions: 271 Failed transactions: 0 Longest transaction: 2.45 Shortest transaction: 0.84 More NFS, concurrency 20: Lifting the server siege... done. Transactions: 857 hits Availability: 100.00 % Elapsed time: 85.56 secs Data transferred: 9.84 MB Response time: 1.97 secs Transaction rate: 10.02 trans/sec Throughput: 0.11 MB/sec Concurrency: 19.76 Successful transactions: 857 Failed transactions: 0 Longest transaction: 6.53 Shortest transaction: 1.15 And with Gluster, concurrency 5: Lifting the server siege... done. Transactions: 75 hits Availability: 100.00 % Elapsed time: 61.26 secs Data transferred: 0.63 MB Response time: 3.96 secs Transaction rate: 1.22 trans/sec Throughput: 0.01 MB/sec Concurrency: 4.85 Successful transactions: 75 Failed transactions: 0 Longest transaction: 4.64 Shortest transaction: 3.54 More Gluster, concurrency 20: Lifting the server siege... done. Transactions: 139 hits Availability: 100.00 % Elapsed time: 84.96 secs Data transferred: 1.16 MB Response time: 11.53 secs Transaction rate: 1.64 trans/sec Throughput: 0.01 MB/sec Concurrency: 18.86 Successful transactions: 139 Failed transactions: 0 Longest transaction: 16.14 Shortest transaction: 10.01 Any ideas how I can improve Gluster's performance? Ryan Williams
