temporal | microservice orchestration platform which enables developers | BPM library
kandi X-RAY | temporal Summary
kandi X-RAY | temporal Summary
Temporal is a microservice orchestration platform which enables developers to build scalable applications without sacrificing productivity or reliability. Temporal server executes units of application logic, Workflows, in a resilient manner that automatically handles intermittent failures, and retries failed operations. Temporal is a mature technology, a fork of Uber's Cadence. Temporal is being developed by Temporal Technologies, a startup by the creators of Cadence. Learn more about Temporal at docs.temporal.io.
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QUESTION
I'm merging some dataframes which have a time index.
...ANSWER
Answered 2022-Apr-16 at 00:45You're in luck: pandas.merge_asof
does exactly what you need!
We use the default direction='backward'
argument:
A “backward” search selects the last row in the right DataFrame whose ‘on’ key is less than or equal to the left’s key.
Using your three example DataFrames:
QUESTION
I want to combine multiple ggplots into one plot with same x and y axis. This is my data. I have one Time column and 6 trend columns (A_Trnd, B_Trnd, C_Trnd etc). I have generated plot for Time vs A_Trnd.
...ANSWER
Answered 2022-Mar-08 at 04:35library(tidyverse)
library(scales)
result <-read.csv("Downloads/Questions Trend - Questions Trend.csv") %>%
mutate(Time = as.Date(Time, format = "%m/%d/%y")) %>%
pivot_longer(cols = -Time, names_to = "group", values_to = "value")
date_breaks <- as.Date(c("9/1/08", "5/12/14", "7/1/17", "2/2/19", "6/3/20"), "%m/%d/%y")
p1 <- ggplot(result, aes(Time, value)) +
geom_point(size = 0.1) +
labs(x = "Month", y = "Temporal Trend") +
scale_x_date(breaks = date_breaks , date_labels = "%Y-%m", limits = c(as.Date("2008-08-01"), as.Date("2021-08-01"))) +
theme(axis.text.x = element_text(angle = 70, vjust = 0.9, hjust = 1),
legend.position = "none") +
geom_smooth(method = "loess", aes(color = group)) +
facet_wrap(vars(group), nrow = 1)
p1
QUESTION
In an Airflow DAG, I am trying to use a TimeDeltaTrigger:
...ANSWER
Answered 2022-Feb-28 at 22:24triggerer
is a process like scheduler
, webserver
, and worker
. You need to start a process or container dedicated to running the triggerer to use deferrable operators.
To start a triggerer process, run airflow triggerer
in your Airflow environment. You should see an output similar to the below image.
QUESTION
Using the Temporal.Calendar of the upcoming proposal of the Temporal global Object, the following short function converts between calendar dates (the 18 Calendars recognized in Javascript).
Currently, the output date returned by Temporal.Calendar for other Calendars is in the format (example): '2022-02-25[u-ca=persian]'
How to avoid usingtoString().split("[")[0])
to get the calendar date without the suffix [u-ca=CalendarName]
as the Intl.DateTimeFormat()
does not recognize the suffix?
ANSWER
Answered 2022-Feb-25 at 18:33You can pass the Temporal.PlainDateTime object directly to Intl.DateTimeFormat, or indirectly by using Temporal.Calendar.prototype.toLocaleString(). This should save you from having to split the string to remove the brackets.
(A good rule of thumb is that if you find yourself doing string manipulation with the output of toString() from any Temporal object, or using new Date()
for that matter, it's probably a sign that there's a Temporal method you should be using instead.)
One caveat is that you have to make sure that the calendar of the locale matches the calendar of the date you are formatting. You can't use toLocaleString() or Intl.DateTimeFormat to do calendar conversion (unless it is from the ISO 8601 calendar). So you should use the withCalendar() method to convert the date to the calendar you want to output it in, as well as making sure the calendar in the Intl options matches it.
Here's my attempt at such a function:
QUESTION
x86_64 has an instruction movdir64b
, which to my understanding is a non-temporal copy (well, at least the store is) of 64 bytes (a cache line). AArch64 seems to have a similar instruction st64b
, which does an atomic store of the same size. However, the official ARMv9 documentation is not clear about whether st64b
, too, is a non-temporal store.
Intel's instruction-set reference documentation for movdir64b
is much more detailed, but I'm not far along enough in my studies to fully understand what each memory type protocol represents.
From what I could deduce so far, the x86_64 instruction movntdq
is roughly equivalent to stnp
, and is write-combining. From that, it seems as if movdir64b
is like four of those in one atomic store, hence my guess about st64b
.
This is almost certainly an oversimplification of what's really going on (and could be wrong/inaccurate, of course), but it's what could deduce so far.
Could st64b
be used as if it were an atomic sequence of four stnp
instructions as a non-temporal write of a cache line in this way?
ANSWER
Answered 2022-Feb-17 at 01:47The ST64B
/ST64BV
/ST64BV0
instructions are intended to efficiently add work items to a work queue of an I/O device that supports this interface. When the target address is mapped to an I/O device, the store is translated as a non-posted write transaction, which means that there has to be a completion message that includes a status code as described in the documentation. The ST64B
instruction simply discards the status code while the other two store it in the register specified by the Xs
operand.
If you look at the pseudocode, these instructions require the target address to be in uncacheable memory:
QUESTION
I'm looking to write a function that takes an audio signal (assuming it contains a single instrument playing), out of which I would like to extract the instrument-like features out of the audio and into a vector space. So in theory, if I had two signals with similar-sounding instruments (such as two pianos), their respective vectors should be fairly similar (by euclidian distance/cosine similarity/etc.). How would one go about doing this?
What I've tried: I'm currently extracting (and temporally averaging) the chroma energy, spectral contrast, MFCC (and their 1st and 2nd derivatives), as well as the Mel spectrogram and concatenating them into a single representation vector:
...ANSWER
Answered 2022-Jan-24 at 23:21The part of the instrument audio that gives its distinctive sound, independently from the pitch played, is called the timbre. The modern approach to get a vector representation, would be to train a neural network. This kind of learned vector representation is often called to create an audio embedding.
An example implementation of this is described in Learning Disentangled Representations Of Timbre And Pitch For Musical Instrument Sounds Using Gaussian Mixture Variational Autoencoders (2019).
QUESTION
I'm trying to use the github actions for first time, I've created and followed the tutorial from github and my .github/workflows/push_main.yml
is :
ANSWER
Answered 2022-Jan-17 at 16:55There is a super convenient way to build, test and aggregate the outcome of changes of some branch before merging using pull requests.
Its common to create a pull request and trigger a workflow doing the checks. Just add "pull_request:" to reuse your existing workflow, to build and test your changes.
QUESTION
CPUs split one instruction into several micro-ops, this works for x86 and ARM cores and maybe several other architectures. Micro-ops could be executed out-of-order and are stored in a ROB. They are retired in-order from this ROB.
How does a CPU handle asynchronous interrupts?
I think of 2 possible implementations:
- CPU will continue executing all micro-ops which are already in ROB, temporally ignoring the coming interrupt.
- CPU will flush its pipeline. But if the pipeline is flushed, could we face a situation when some micro-ops of an instruction are retired, while other micro-ops of the same instruction are flushed from ROB? And what resources will remain in a pipeline after the interrupt is raise
ANSWER
Answered 2022-Jan-06 at 17:17Interrupts are definitely always taken on instruction boundaries, even if that means discarding partial progress and restarting execution after interrupt return, at least on x86 and ARM microarchs. (Some instructions are interruptible, like rep movsb
has a way to update registers. AVX2 gathers are also interruptible, or at least could be; the mask-updating rules might only ever get applied for synchronous exceptions encountered on one element).
- Interrupting instruction in the middle of execution
- Interrupting an assembly instruction while it is operating
There's some evidence that Intel CPUs let one more instruction retire before taking an interrupt, at least for profiling interrupts (from the PMU); those are semi-synchronous but for some events don't have a fixed spot in the program where they must be taken, unlike page faults which have to fault on the faulting instruction.
A multi-uop instruction that's already partially retired would have to be allowed to finish executing and retire the whole instruction, to reach the next consistent architectural state where an interrupt could possibly be taken.
(Another possible reason for letting an instruction finish executing before taking an interrupt is to avoid starvation.)
Otherwise yes, the ROB and RS are discarded and execution is rolled back to the retirement state. Keeping interrupt latency low is generally desirable, and a large ROB could hold a lot of cache-miss and TLB-miss loads making the worst-case interrupt latency really bad, so a malicious process could hurt the capabilities of a real-time OS.
- When an interrupt occurs, what happens to instructions in the pipeline?
- Estimating of interrupt latency on the x86 CPUs
- (maybe) Reliability of Xcode Instrument's disassembly time profiling mentions performance event sampling.
QUESTION
We have recently upgraded our project to Microsoft.EntityFrameworkCore 6.0.0
. This release enables SQL Server temporal tables out of the box.
https://stackoverflow.com/a/70017768/3850405
We have used temporal tables since Entity Framework Core 3.1 using custom migrations as described here:
https://stackoverflow.com/a/64776658/3850405
https://stackoverflow.com/a/64244548/3850405
Simply following Microsofts guide will of course not work since default column names are PeriodStart
and PeriodEnd
instead of our SysStartTime
and SysEndTime
. History table name does not match either.
ANSWER
Answered 2022-Jan-05 at 22:41Not possible to fix in EF Core 6.0
.
From @ajcvickers, Engineering manager for Entity Framework:
Unfortunately, there isn't any workaround for this that allows both the use of the new temporal table features, and mapping the period columns to non-shadow properties.
https://github.com/dotnet/efcore/issues/26960#issuecomment-991867756
Vote below if you want to see this feature in EF Core 7.0
:
QUESTION
So I want the users to have many notes, and this means that the relation type between users and notes should be OneToMany(meaning one user has many notes). So i have a very strange bug in my application. When create and add the note to the database, and then i also save it in the users it works fine for the first time, however at second try i get the error "Cannot add or update a child row: a foreign key constraint fails". When i add one note to the database it works but when i add another note it gives the same error. I have fixed the bug with the set foreign_key_checks=0 in the database and it works, but it does not work when from my application.
Here are my codes for different classes:
Notes:
...ANSWER
Answered 2021-Dec-24 at 11:14According to the Hibernate Documentation when you have a UniDirectional relation in your entity schema and you have only the side of @OneToMany
, you can't use the annotation @JoinColumn
.
When using a unidirectional @OneToMany association, Hibernate resorts to using a link table between the two joining entities.
You must remove the @JoinColumn
so that hibernate follows the default process of creating a intermediate join table and then it will be able to proceed.
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