itamarhaber

-- DUMPs a Redis key in TCL-compatible binary string encoding

local b = redis.call("DUMP",KEYS[1])
local s = ""

for i = 1, string.len(b), 1 do 
   s = s .. string.format("\\x%02X",string.byte(b,i))
end

return s

itamarhaber

Redis 6.0 GA Apr 30, 2020

• Access Control List (ACL)
• Redis Serialization Protocol 3 (RESP3)
• Client Side Caching (CSC)
• SSL (#WontFix)
• Better expiry!!!
• Diskless replication!11
• more!!!111one (https://raw.githubusercontent.com/redis/redis/6.0/00-RELEASENOTES)

itamarhaber

*3
$3
SET
$3
key
$5
value

itamarhaber

FROM alpine

ENV PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/root/.local/bin

COPY requirements.txt /mkdocs/
WORKDIR /mkdocs

RUN apk --update upgrade \
&& apk --no-cache --no-progress add py-pip \
&& rm -rf /var/cache/apk/* \

itamarhaber

ACL v6RC1 default app profile

The purpose of this exercise is to define a "default" application ACL profile that can access the all the data without being able to cause too much harm.

Additive ("future-proof") profile

Required extra permissions:

• All functional categories
• CLIENT ID|GETNAME|REPLY|SETNAME|TRACKING|GETREDIR: must for modern clients
• CLUSTER COUNTKEYSINSLOT|GETKEYSINSLOT|INFO|KEYSLOT|MYID|NODES|SLOTS: must for cluster-aware clients

itamarhaber

1. Clone, sh get_deps.sh, and make run https://github.com/lantiga/RedisTF
2. pip install redis tensorflow
3. cd models
4. Run python tf-minimal.py to prepare a minimal graph
5. The attached redistf-py.py demonstrates how to run the test in the README from Python:

$ python redistf-py.py
Setting the graph: OK
Setting tensor t1: OK

itamarhaber

Edgexfoundry and Redis for Core Data PoC

Objectives

• Implement the Redis client for edgex-go core data client tests/benchmarks
• Compare between TCP, UDS and embedded Redis connections vs. Mongo's

Setting up

Server set up

itamarhaber

Reading Building a sliding window rate limiter with Redis, and w/o addressing the actual logic (which may or may not work).

Optimize by:

1. Lua seems a much better choice: idiompotent, portable, server-side, less bandwidth, atomic...
2. The call to ZRANGEBYSCORE seems to be unused, should be commented out if so
3. Looking at the use of ZRANGE, it appears that ZCARD it what's actually needed

The (untested) Lua snippet:

itamarhaber

             local 
            h,d,r=9,
           0,{} while
          h>0 do local
         l='' h=h-1 for
        x=0, 38 do local
       a=x-6 if a<0 then a
     = -a end if a <= d then
    l = l .. '*' elseif (0.3/
   (h+1)) > math.random() then

itamarhaber

--[[
Sets a bitmap range

Bitmaps are stored as Strings in Redis. A range spans one or more bytes,
so we can call `SETRANGE` when entire bytes need to be set instead of flipping
individual bits. Also, to avoid multiple internal memory allocations in
Redis, we traverse in reverse.

Expected input:
  KEYS[1] - bitfield key