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

Wk7 Quiz Question
I don't quite understand why query() for b3 is not 2 b3 has a = {1}, and r = {1,2} which are all correct then why i
- 1 Followup Comment
4/15/23
3
2019 Final Exam Question 1 c)
Question 1c asks to find 3 pairs of concurrent events using only Lamport clocks. Does this mean "using the event d
- 4 Unresolved followups
- 4 Followup Comments
4/15/23
7
Optimal dimensions for CAN routing given node number
I made a plot for the average routing path length on desmo https://www.desmos.com/calculator/xs60xtqkzl seems when n =
4/15/23
1
Further Request for M3 Mark Releases
I understand marking is time-consuming but as we approach the week before the final exam as well as a couple of hours be
4/14/23
4
m3 marks
m3 marks... can they be released?
4/12/23
2
Are We Required to Pass the Exam?
Greetings Prof/TAs, I was informed that some courses have a requirement were we must pass the final exam (>50%) in
- 2 Followup Comments
4/12/23
M4 Presenting Load Balancing
If our group choose to implement additional server-side features such as load balancing, we realize it would be hard to
4/11/23
1
Final Exam Aid Sheet
Hello, I noticed that the final exam is Type C and we're allowed to bring in an aid sheet. Does this aid sheet need
4/9/23
posting solutions to old finals
can the solutions to the old final please be posted? thanks,
- 2 Unresolved followups
- 2 Followup Comments
4/9/23

week 4/2 - 4/8

nvm
nvm
4/4/23
2
discussion board monitoring
Piazza monitoring can really be improved. Loads of unanswered questions that are over a week old.
- 1 Unresolved followup
- 1 Followup Comment
4/4/23
2
Quiz this week?
Is there a quiz this week? Thanks,
- 1 Unresolved followup
- 1 Followup Comment
4/3/23

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

week 2/19 - 2/25

Requirement of Separating Directories/ Files For Each Server
While consistent hashing and metadata are used to keep track of the tuples belonging to each of the storage servers, is
2/25/23
Assumption about ECS / Client connection order
Hi, Can we make the assumption that for the first server, the ECS will connect to the KVServer before any clients do?
- 1 Unresolved followup
- 2 Followup Comments
2/25/23
Unable to parse keyRange response
How many spaces should be in between keyrange_success and the server keyranges? What is the exact form that is expected
- 3 Followup Comments
2/24/23
M2 ECS Clarifications
Could an instructor address the questions in: https://piazza.com/class/lctgp0rn94237x/post/122 The starter code seems o
2/24/23
Handling KVServer shutdown
If a KVServer goes offline abruptly, should the ECS silently reallocate the block of hashes that it was originally respo
2/24/23
M2 Report reused content
Should we include all the content about the M1 milestone in the M2 report, or only discuss new features that have been a
2/24/23
Expected Functionality of setupNodes Function
Hello, I was wondering what the expected functionality of the setupNodes function (pictured below) in the ECSClient.ja
2/24/23
Online tester error
Our group ran into an error. It seems like our repo needs to be reset. Any way to fix this?
- 2 Followup Comments
2/23/23
Error Handling
If we shut down all the servers, should the data still persist? i.e. if we start up one server again after they’ve all b
2/22/23
M2 Tester Log Level
Hello, The M2 Tester sets the log level of the ECS to "FINEST". This does not appear to be a standard Log4j lo
2/22/23
Milestone 2 Due Date
When is milestone 2 due? It is mentioned it is the week after reading week but there's no specific deadline.
2/22/23
Using Zookeeper
Hello,If we use ZooKeeper in our code, does it have to be started with the ECS server or can we start it manually (using
2/21/23
ECS & Server CLI and Communication
Hello,Just wanted to ensure I have a correct understanding on how the ECS and KVServers will work together.(1) Do both t
- 1 Unresolved followup
- 2 Followup Comments
2/21/23
keyrange_success payload
As I understand it, `keyrange_success` should be followed by semicolon separated triplets including the hash endpoints &
- 1 Unresolved followup
- 3 Followup Comments
2/21/23
Does ECS use the same command line options as KVServer?
Thanks.
2/19/23

week 2/12 - 2/18

week 2/5 - 2/11

week 1/29 - 2/4

week 1/22 - 1/28

question history:

question

78 views

Requirement of Separating Directories/ Files For Each Server

While consistent hashing and metadata are used to keep track of the tuples belonging to each of the storage servers, is it a requirement of Milestone 2 for us to save the data of each of the storage servers in separate directories/files?

the students' answer,

where students collectively construct a single answer

the instructors' answer,

where instructors collectively construct a single answer

yes. different servers do not share the same file

followup discussionsfor lingering questions and comments

Start a new followup discussion