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Notes for the CDMS workshop March 2014
MIDAS general picture
MIDAS main data path
hardware -> mfe user thread -> ring buffer -> (compression thread -> ring buffer ->) mfe main thread -> TCP socket -> mserver -> event buffer -> event builder thread -> SYSTEM buffer -> mlogger -> (ring buffer -> compression thread -> ) data file -> lazylogger -> dcache/castor/hadoop/cloud storage
Needs to scale from 0.5GB/0.3GHz/1core PPC on FPGA to 1GB/1GHz/1core 32-bit ARM to 64GB/4GHz/12core 64-bit x86!
MIDAS web security
Error creating thumbnail: convert-im6.q16: non-conforming drawing primitive definition `stroke-linecap' @ error/draw.c/RenderMVGContent/4300.
MIDAS slow controls paths
Error creating thumbnail: convert-im6.q16: non-conforming drawing primitive definition `stroke-linejoin' @ error/draw.c/RenderMVGContent/4300.
MIDAS history paths
hardware -> mfe -> SYSTEM buffer -> mlogger -> data.mid.gz mfe -> ODB -> hotlink mlogger -> hs_write -> .hst binary file, MySQL database, SQLITE database, (maybe "no sql" database)
user web browser -> mhttpd -> hs_read -> read from .hst binary file, MySQL database, etc -> use "gd" to make .png image -> send png file to user -> (future: return to user a JSON data, plot using JS graphics)