Hi, The question is about how to use hyperscan database. I have compile some original databases, and next I want reconstruct them on different memory locations (say, NUMA nodes). To save time of compiling patterns, I just follow steps as below: compile original databases A, B, and get their size NA, NB (by hs_database_size) allocate enough memory (>=(NA+NB)) at new memory locations; the start addresses are A’，B' memcpy A to A’, and B to B’ allocate scratch for A’ and B’ These steps go well, but I have some problems when calling hs_scan: when link to debug-compiled hyperscan library, an assertion fails (a value is not 64 bits aligned) I compile 4 databases and 3 of them work well, but one raises segment fault After long time debugging, I think maybe I shouldn’t memcpy database simply like above. Do I have to call hs_serialize_XXX to serialize original databases and then deserialize them on new memory locations? Thanks for your reply, Zhao Ziqing