Starting Mongo

This will generate the commands you need:

print("rm -Rf /ramdisk/*")
print("mkdir -p /ramdisk/configdb")
print("sudo numactl --interleave=all mongod --configsvr --dbpath /ramdisk/configdb --port 27019 &")
print('sleep 10')
print("sudo numactl --interleave=all mongos --configdb 127.0.0.1:27019 &")
print('sleep 5')
n = 6
i0 = 17

mongo_commands = []

for i in range(i0 - n, i0):
    print("mkdir -p /ramdisk/db%d" % i)
    print("sudo numactl --interleave=all mongod --dbpath /ramdisk/db%d --port 270%02d&" % (i,
                                                                                          i))
    print("sleep 1")


    mongo_commands.append('sh.addShard( "127.0.0.1:270%02d" )' % i)


print('')
for mc in mongo_commands:
    print(mc)

print('sh.enableSharding("input")')
print('sh.shardCollection("input.dataset", { "_id": "hashed" } )')