Re: [HPDD-discuss] llapi_file_get_stripe arguments

Ø What is the largest number of OST's that a file can be striped across? Hi John, Starting with Lustre version 2.2, the largest possible stripe count for a single file is 2000 OSTs. Prior to that it was 160 OSTs. [Description: cid:image001.gif@01C9FE3D.1D8A68C0] Dr. Brett Lee, Solutions Architect High Performance Data Division, Intel +1.303.625.3595 From: HPDD-discuss [mailto:hpdd-discuss-bounces@lists.01.org] On Behalf Of John Bauer Sent: Thursday, March 13, 2014 12:09 PM To: hpdd-discuss(a)lists.01.org Subject: [HPDD-discuss] llapi_file_get_stripe arguments I am using the llapi_file_get_stripe() function. The second arguement is struct lov_user_md_v1 { __u32 lmm_magic; __u32 lmm_pattern; __u64 lmm_object_id; __u64 lmm_object_seq; __u32 lmm_stripe_size; __u16 lmm_stripe_count; __u16 lmm_stripe_offset; struct lov_user_ost_data_v1 lmm_objects[0]; } How do I indicate to the kernel how many elements are in the lmn_objects[] array? Or, How do I know how large to make the array? What is the largest number of OST's that a file can be striped across? Thanks John