Hi, everyone, I just want to know whether there is better way to make Linux VFS read ahead more aggressive (from my reading the source code, the maximum read ahead of file is statically set to 2MB). E.g., to change the read ahead window to 64MB. What I am doing is tuning CEPHFS read performance, however, remote is very poor (100+MB) comparing to local test (374MB). I am testing using dd (this should also the case for most real-life scenarios), so an aggressive read ahead policy should be really help for me to make the IO asynchronous and make the backend disks running concurrently. Thanks in advance! Peter -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
