Start EVA Server#
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Launch EVA server#
We use this notebook for launching the EVA server.
## Install EVA package if needed
# %pip install "evadb[dev]" --quiet
import os
import time
from psutil import process_iter
from signal import SIGTERM
import re
import itertools
def shell(command):
print(command)
os.system(command)
def stop_eva_server():
for proc in process_iter():
if proc.name() == "eva_server":
proc.send_signal(SIGTERM)
def launch_eva_server():
# Stop EVA server if it is running
stop_eva_server()
os.environ['GPU_DEVICES'] = '0'
# Start EVA server
shell("nohup eva_server > eva.log 2>&1 &")
last_few_lines_count = 3
try:
with open('eva.log', 'r') as f:
for lines in itertools.zip_longest(*[f]*last_few_lines_count):
print(lines)
except FileNotFoundError:
pass
# Wait for server to start
time.sleep(10)
def connect_to_server():
from eva.server.db_api import connect
%pip install nest_asyncio --quiet
import nest_asyncio
nest_asyncio.apply()
# Connect client with server
connection = connect(host = '127.0.0.1', port = 5432)
cursor = connection.cursor()
return cursor
# Launch server
launch_eva_server()
nohup eva_server > eva.log 2>&1 &