On 2017/1/17 下午11:00, Eric Schwarz wrote: > Hello mailing list, > > I have got two questions: > > 1.) I have set-up a softraid (raid level 0) with mdadm using two M.2 > modules. For one module the throughput is ~350MB/s (no mdadm) for two > modules the throughput is ~500MB/s which is less than factor 1,5 of the > throughput of a single drive. The filesystem used is ext4. Is there > someone having some values for comparison? For me the throughput gain > seems to be too little. The test was done using a HP Z840 workstation. > Hi Eric, Could you attach your testing script as well, than we can have a look. > 2.) We want to configure a softraid (raid level 0) with mdadm which can > be used from within Linux but also it should be possible to write data > to the raid w/ DMA directly from the FPGA which is also connected to the > PCIe bus as a slave as well as the M.2 modules. How can that be achieved > using existing kernel infrastructure? > I don't know such existing kernel code. Maybe other people can provide useful information. Coly -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
