pinned

Crowdsourcing final answers
Would people prefer a shared google doc to compare final answers? #pin
- 3 Followup Comments
4/18/23
Search for Teammates!
- 3 Open Teammate Searches
1/12/23

week 4/30 - 5/6

Final marks
when will final marks be released?
- 1 Followup Comment
5/2/23

week 4/23 - 4/29

m4 marks
when will m4 marks be released?
- 1 Followup Comment
4/27/23

week 4/16 - 4/22

Milestone 2 Tester Bonus Marks
Just a reminder to consider the bonus marks for using the online tester for M2 before the M3 deadline, as per the announ
- An instructor thinks this is a good question
4/22/23
GG
We ball
- 3 Followup Comments
4/20/23
Found Lost Airpods in Exam Room 3153
Hey there! I found a pair of airpods in exam room 3153. Wanted to give it to the invigilators but they left. Ill give i
4/20/23
piazza response rate💀
- 1 Followup Comment
4/20/23
Lecture question on Reed Solomon Code
Can someone confirm the answer above is correct? My understanding is we can always recompute parity bytes using parity
- 2 Followup Comments
4/19/23
CAN routing number of neighbour nodes
Hello, This slide seems to suggest that in CAN routing each node can maintain up to 2d neighbour nodes. However, thi
- 1 Followup Comment
4/19/23
3
question on class of 9's
Let's say a system is 98.9999% available which is close to 99%. Will class of 9's measure still say it's one
4/19/23
Using iPad to handwrite the cheat sheet
Hello, I would like to get clarification from an instructor on whether handwriting my cheat sheet on an iPad and then pr
- 3 Followup Comments
4/18/23
Piazza answering
It would be great if we could get some answers on the piazza, especially considering how close to the final exam we are.
- 1 Followup Comment
4/18/23
2
2019 Final Q3 Execution sequence for each process
How would a "valid execution sequence for each process" look like? Is it writing the order for each different
4/18/23
1
Requirement analysis (Safe, Liveness, Ordered) for Lamport algorithm?
How can we prove Lamport ME algo is safe and live? fairness is easy to prove as a priority queue is maintained at all no
4/17/23
2
nodes affected when splitting CAN
why are only O(d) nodes effected? are we counting the neighbours who need to update their routing table?
4/17/23
1
question RE number of neighbours in CAN
each node has 2d neighbours but here Node 4 has 6 neighbours. Is it possible?
4/17/23
1
Question RE Chord key location
should it paraphrase to "look for predecessors first" instead of successor of key? for the last location we sele
4/17/23
1
Consistency model ranking
If a system is sequentially consistent does that mean it's also casual/FIFO/weak consistent? Does this logical apply
- 2 Unresolved followups
- 2 Followup Comments
4/17/23
6
root tablet vs. metadata tablets vs. user tablets
What's stored in each and why do we need all three?
4/17/23
1
Question RE coordination service
Why do we still need Master in BigTable to do load balancing when there is Chubby as coordination service? Seems it'
4/17/23
1
Question about reliability in lecture
In week 1 slide 2 pg.7 I can understand the highly available part but why is it highly unreliable?
- 1 Followup Comment
4/17/23
mapreduce quiz answers
can the marks get released? we're waiting on q1 and q2 to be graded.
4/17/23
1
Photocopy Aid Sheet to Prevent Smudging
Hi, I know that we can use the Examination Aidsheet in which we have to write it by hand, but I was wondering when I f
- 1 Unresolved followup
- 3 Followup Comments
4/16/23

week 4/9 - 4/15

week 4/2 - 4/8

week 3/26 - 4/1

week 3/19 - 3/25

week 3/12 - 3/18

week 3/5 - 3/11

week 2/26 - 3/4

Server/Client behavior is ECS is killed
What is the expected behavior if ECS is killed? Should servers continue to accept requests/store data? Should they shut
- 1 Followup Comment
3/4/23
Important assumptions about M2
Let's assume server A and server B, both of which have no data, are added to ECS. Now let's say server C, which
3/4/23
Auto tester not working
When trying to run the autotester, it shows that nothing gets run, as shown below. The tester does not even attempt to c
- 3 Unresolved followups
- 5 Followup Comments
3/4/23
M2 Assignment Feedback
I have two pieces of feedback for the M2 milestone so far that I hope can be addressed by M3: 1. The starter code is ou
- An instructor thinks this is a good question
- 2 Followup Comments
3/4/23
Performance Testing
Hello, Does the performance testing for m2 need to be for both latency and throughput? Or can it just be for one of th
- 4 Followup Comments
3/3/23
Not Enough Disk Space for Enron Data Set
I'm running out of disk space when I do: wget http://www.cs.cmu.edu/~enron/enron_mail_20150507.tar.gz How are we
3/3/23
Clarification of the M2 instruction on retry operation
From the first screenshot my understanding is that we will display retry to the client front-end to be "transpare
- 1 Unresolved followup
- 7 Followup Comments
3/3/23
M2: Is ':' part of what's being hashed by hash(ip:port)?
The email announcement yesterday reminds us that: As stated in the handout, you MUST use md5 for hashing. During the de
3/3/23
Is the connection between a KVServer and the ECS supposed to be kept open?
Can a KVServer use different ports for communicating with the client and ECS? A ServerSocket cannot initiate any connect
3/3/23
Remove of a Server
The client use metaData to find the correct server, but what if the server it connected to is removed and it cannot get
3/3/23
M2 Test Cases
Are there no new test cases provided for M2? The instructions say "Together with this handout, we provide you with a
3/3/23
Teaching Team Ignored Extension Request?
A post was made on Sunday last week, Piazza post @143, with 39 upvotes (the most upvoted Piazza post yet). The teachin
- 2 Unresolved followups
- 4 Followup Comments
3/3/23
Repository error - Need to reset
Ran into the same error again. Can we get a reset please?
3/2/23
Question follow up
Does anyone know the answer to post @140?
3/2/23
M1 Component Weights
How are the bonus, report, and demo weighted for A1? I can't seem to find the exact weightings on Quercus.
3/2/23
Message Format
Are there any reserved characters that we can assume WON'T be used in keys, values, or messages? I'm asking for
3/2/23
Adding servers to ECS
Can we assume that the whole process of adding a server to ECS will be fully complete before initiating the addition of
3/2/23
Persistent Storage for M2
Hello, I wanted to know what the expectation for persistent storage was in the context of M2, and I have a couple relat
- 4 Followup Comments
3/1/23
Removal of a server metadata update question
Hi, I'm curious why we would want to send a metadata update to the successor server (A) when removing a server (B)
3/1/23
Can the follow up to @146 be addressed?
Can the follow up to @146 be addressed? The online tester can't be run.
- 1 Unresolved followup
- 1 Followup Comment
3/1/23
Does the ECS Create the KVServers?
Is the ECS supposed to launch the requested number of KVServer.jar? Or should it just sit there waiting for new KVServer
- 1 Unresolved followup
- 1 Followup Comment
3/1/23
Metadata and message size
What happens if metadata that we want to send between client/server/ECS exceeds our predefined message size?
2/28/23
What if the KVStore tries to access a server that has shut down?
Case 1: Client Does Not Know Any Active Servers Say we initially have server A and client A knows about this server. Th
- 1 Followup Comment
2/28/23
Github classroom tester issue - maybe needs to be reset
Also, I cant even schedule a retest....
- 4 Unresolved followups
- 12 Followup Comments
2/28/23
SERVER_WRITE_LOCK under different conditions
Hi, I wanted to know about the conditions with which we set the SERVER_WRITE_LOCK as I feel it's a bit ambiguous in
- 1 Unresolved followup
- 4 Followup Comments
2/26/23
Wk 6 Quiz
Hello would it be possible to open up wk6 quiz?
2/26/23
M2 Extension Request
There is a lot going on with other midterms, iron ring ceremonies, and graduation events between March 4-March 10th and
- 5 Unresolved followups
- 5 Followup Comments
2/26/23

week 2/19 - 2/25

week 2/12 - 2/18

week 2/5 - 2/11

week 1/29 - 2/4

week 1/22 - 1/28

question history:

question

87 views

Not Enough Disk Space for Enron Data Set

I'm running out of disk space when I do:

wget http://www.cs.cmu.edu/~enron/enron_mail_20150507.tar.gz

How are we supposed to use this data set?

Also, what is even supposed to be the key and what should be the value?

the students' answer,

where students collectively construct a single answer

I think its a relic of past stuff like a lot of the starter code. There does not seem to be a way to unpack the dataset and not go over disk quota, so I guess just ignore it. I'm 90% sure that the stuff in the lab is going to all be using key/value pairs created in the lab.

followup discussionsfor lingering questions and comments

Start a new followup discussion